by Combat Rifle | Aug 7, 2016 | Reference |
CHRIS KYLE 300 WIN MAG | CHRIS KYLE AMERICAN SNIPER
Black Hills .300 Win Mag
Chris Kyle 300 Win Mag
Recently I was researching .300 win mag ammunition and I came across some Chris Kyle 300 Win Mag information that quoted the Chris Kyle “American Sniper” autobiography. I ended up purchasing the book. I guess I always figured Chris Kyle used a 7.62×51 and a .50 BMG. Turns out .300 Win Mag was his caliber of choice. Below is the .300 Win Mag excerpt from the kindle edition of the book.
Chris Kyle American Sniper Autobiography | CHRIS KYLE 300 WIN MAG | CHRIS KYLE AMERICAN SNIPER
The .300 is in another class entirely. As I’m sure many readers know, .300 Win Mag (pronounced “three hundred win mag”) refers to the bullet the rifle fires, the .300 Winchester Magnum round (7.62 × 67 mm). It’s an excellent all-around cartridge, whose performance allows for superb accuracy as well as stopping power. Other services fire the round from different (or slightly different) guns; arguably, the most famous is the Army’s M-24 Sniper Weapon System, which is based on the Remington 700 rifle. (Yes, that is the same rifle civilians can purchase for hunting.)
In our case, we started out with McMillan stocks, customized the barrels, and used 700 action. These were nice rifles. In my third platoon—the one that went to Ramadi—we got all new .300s. These used Accuracy International stocks, with a brand-new barrel and action. The AI version had a shorter barrel and a folding stock. They were bad-ass. The .300 is a little heavier gun by design. It shoots like a laser. Anything from a thousand yards and out, you’re just plain nailing it. And on closer targets, you don’t have to worry about too much correction for your come-ups. You can dial in your five-hundred-yard dope and still hit a target from one hundred to seven hundred yards without worrying too much about making minute adjustments. I used a .300 Win Mag for most of my kills. – Chris Kyle
by Combat Rifle | Apr 9, 2016 | Optics |
MILDOT MASTER
MILDOT MASTER – The mil-dot reticle is in increasingly widespread use among long-range rifle shooters as a means of estimating the range to the target. This estimation is critical in order to correct for the varying degree of projectile drop (and/or wind drift) at different ranges and thereby enable the shooter to hit the target. With training and familiarization, an experienced marksman can accurately estimate range to target by using this type of reticle and by making the appropriate calculations. Originally fitted to telescopic sights designed for military (and later police) use, the mil-dot reticle has seen growing acceptance in the civilian sector among target shooters and hunters.
By using a set of fixed references within the scope, the shooter can compare the size of the target, a portion of the target, or a nearby reference target to a series of precisely sized dots and spacing. By estimating the size of the target or nearby reference and noting the number of mils that equal the size of the target, the shooter can determine the range to the target by applying a formula (size of target in yards multiplied by 1000, divided by size of target in mils, equals range to target in yards), usually done with the help of a conventional hand held electronic calculator. However, there are problems associated with the use of an electronic calculator. The MILDOT MASTER is designed to eliminate these problems.
- Problem: The necessary calculations are somewhat complex and depend upon the shooter’s ability to remember and correctly apply the formula. Solution: With the Mildot Master, you don’t have to memorize formulae, as the correct formulae are already built into the scales.
- Problem: The size of the target is more often than not mentally estimated in inches, necessitating an additional calculation to convert the target size into a decimal equivalent of yards. ie: 18″ shoulder width. If the range is to be calculated in meters, an additional conversion from yards to meters in necessary. Solution: No conversion of estimated target size from inches into decimal equivalent of yards is necessary, as the Target Size Scale is in increments of feet and inches on the Mildot Master®.
- Problem: Even after the shooter has gone through the range calculation procedure, the amount of bullet drop (or wind drift) applicable to that range must now be applied to the sight picture to enable a hit on the target. Either the scope must be adjusted or the sight picture “held over”, which necessitates a second series of calculations to translate the needed amount of correction into a scope adjustment or hold-over figure for that range and load. Solution: The Mildot Master makes this process extremely simple by performing range determination, sight adjustment, and hold-over calculations simultaneously. Once the range has been determined by aligning the Target Size with the measured number of mils, bullet drop/drift figures are automatically aligned with the corresponding sight adjustment/hold-over figures.
- Problem: Aside from the possibility of errors occurring during these calculations, the time involved in such calculations can prove problematic in certain scenarios, such as military or police counter-sniping operations, timed competitive target-shooting events, or hunting situations. Solution: Speed of calculations necessary to determine range to target and required telescopic sight adjustment and/or hold-over can be significantly reduced by using the Mildot Master in lieu of a conventional hand-held electronic calculator.
The Mildot Master is an analog calculator designed along the principle of a slide rule, utilizing logarithmic and inverse logarithmic scales developed specifically for performing the following operations:
- Rapid and simple calculation of range to target, based on a measurement of the target with a mildot reticle, by aligning the estimated target size directly opposite the mildot measurement, and then reading the range at an index mark.
- Rapid and simple calculation of the amount of sight correction necessary to compensate for bullet drop and/or wind drift for a given range, enabling the shooter to determine either the equivalent telescopic sight adjustment (minute-of-angle, or MOA) or the equivalent hold-over (mils), by reading equivalents in both MOA and mils directly opposite the bullet drop/wind drift figure.
- Additionally, angle of fire for uphill or downhill shots can be accurately measured, and the up/down compensation can be closely calculated to reduce the errors such shots can induce.
- No conversion of estimated target size from inches into decimal equivalent of yards is necessary, as the Target Size Scale is in increments of feet and inches.
- No entry of data or operations through a keypad is necessary, as the device is purely analog and only requires the alignment of figures on scales.
- No memorization of formulae is necessary, as the correct formulae are built into the scales.
- No complex calculations for determination of telescopic sight adjustment or hold-over at various ranges are necessary, as the scales of the device convert drop/drift figures directly into both MOA and mils.
- No separate data sheet is necessary for bullet drop figures, as the reverse side of the device is designed to accommodate either commercially available data decals or user-produced data strips.
MILDOT MASTER
by Combat Rifle | Aug 2, 2015 | Reference |
CCI Standard Velocity 22 Box
My 22 Keeps Jamming, My 22 Rifle Keeps Jamming, My 22 Pistol Keeps Jamming are the most often made statements on the .22 forum.
So you drive to the range with your shiny new .22 rifle and a brick of .22 ammo you purchased at the time of the rifle purchase. You setup your targets, you load your magazines, you get into position, line up your sights or crosshairs on the target, pull the trigger, bang you fire your first shot. Once again you get on target, pull the trigger and click, nothing happens. You examine the .22 rifle and you notice one of several things happened.
- Previous round never ejected
- Bolt never moved the next round out of the magazine and into the chamber.
- Next round didn’t fully chamber
- Round is chambered but did not fire
- Previous spent casing is trapped in the action
- Next round is out of position in the chamber.
All of the above issues can lead to a very bad day at the shooting range and frustration and disappoinment with your new .22 rifle. The natural first path to diagnosing the trouble is a magazine swap. Again disappoinment in your new .22 rifle.
So what’s the cause of the problem you ask? Two stories first.
When I turned 21 and got my pistol permit I bought a Smith&Wesson 422 pistol. I grew to despise that pistol because it rarely fired more than once in a row. Fast forward a couple years later I bought an AR15 .22 conversion kit for my Colt Sporter Match HBAR. that too was a disappointment and pretty much a single shot rifle. Now unfortunately at that time there was no internet to seek for help. I was pretty much left to my own devices and with advice from friends and fellow shooters. None of which had any experience with an AR15 and most had little or no experience with semi-automatic .22 pistols.
It wasn’t until a couple years later shooting with a friend that I learned what my problem was. The problem was the ammunition. His CCI .22 ammunition functioned nearly flawlessly in both guns. The thing was I was living off the same two types of .22 ammunition for years. Years earlier my dad had come across an outstanding deal on Remington Thunderbolt .22 ammunition. He bough cases of it, 30,000 rounds. Our Marlin Model 60 devoured it without hardly an issue. Insult to injury I bought a few bricks of Winchester cheap .22 ammo for the 422 and later to be used with my AR15. Guess what? Ammunition lasts a long time when your .22 will only fire one round at a time.
The short answer to “My 22 Rifle Keeps Jamming” is you need to find what ammunition works best in your .22. Now don’t think you need to run out and buy the most expensive .22 ammunition on the market. I learned that even guns like my Smith&Wesson Model .41 will not digest many premium brands and types of ammunitions.
So now your thinking what can be so different about one brand or another of .22 ammunition? First off many types of .22 ammunition were developed before the landscape was filled with semi-automatic .22 rifles and handguns. The semi-automatics that have been around the longest like the Marlin model 60, Ruger 10/22, Ruger Mark and Browning Buckmark pistols will often embarass new owners of modern .22’s.
While .22 ammunition is made to industry specifications the individual design of the .22 ammunition brands and categories varies greatly. Details such as pressure curves, primer material, rim design and hardness, coatings and bullet shapes all affect function and if you have or plan on having more than one .22 dont be surprised if you do not find a single .22 ammunition that feeds reliably in all your .22’s. Dont forget you dont just want a reliable .22 ammunition you also want accurate .22 ammunition.
What .22 ammunition do I shoot? Well I have a little bit of everything. Typically though I suggest to folks start with Federal bulk ammunition (not American Eagle), the cheap stuff. If that doesnt work move up a few grades. I use the Federal Gold Medal more often than not. I keep a lot of standard velocity CCI, CCI GreenTag and Federal Gold medal match on hand as well. I also have every type of RWS. I have found some to be very reliabe and accurate but the ammunition is less universal across my .22’s. It’s also important to note there are lot variations in ammunition. It seems more noticable in bulk .22 ammunition
After you shoot a few thousand rounds through your .22 rifle or pistol and break it in it’s always worth trying ammunition that didn’t work previously.
By the way I recomend every .22 shooter own a .22 bolt action rifle or .22 revolver to use the .22 ammunition that does not function in your semi-automatics. See what I did there? I helped justify another .22 purchase.
My 22 Keeps Jamming, My 22 Rifle Keeps Jamming, My 22 Pistol Keeps Jamming
by Combat Rifle | Jun 3, 2015 | 1911 Pistol |
The U.S. M1911/M1911A1 pistols & commercial M1911 pistols: A shop manual (.45 auto series): Jerry Kuhnhausen
The U.S. M1911/M1911A1 Pistols and Commercial M1911 Type Pistols: A Shop Manual (Vol 2 in the Kuhnhausen .45 Auto Series): Jerry Kuhnhausen: Books – A great follow-up to Volume 1. This is not a revision of Volume 1 and not a rehash of old military manuals! This book is absolutely loaded with new and updated material, parts dimensions and hardness specifications, and the nuts and bolts tech data required to dimensionally inspect, restore, repair and build super accurate, super reliable, “blueprint” quality carry and competition grade M1911s.
Volume 2 adds to, but does not replace Kuhnhausen’s original Volume 1.
600 new drawings, graphics & photos specially produced for this superb new book.Click here for a sample page.
Volume 2 continues on where Volume 1 leaves off-
And, Volume 2 has even more:
More on basic pistol function; more on design theory; more parts data; more on parts fitting; more on barrel fitting; more on accurizing; more on reliability; and more on everything…
Expanded edition – 207 pages. 6″ x 9″. Softbound, filled with incredibly crisp, clear, cutaway drawings, exploded views, how-to pictographs, and photos; complimented by very readable, detailed text, dimensioned close ups of all the components and valuable tricks of the trade. If you want to understand the 1911, how it functions, what causes it to malfunction and how to fix it, you must have this book. Includes what are probably the best set of instructions for fitting a custom barrel available to date. Jerry Kuhnhausen illustrates how to fit parts to the proper dimensions and install them correctly – a must whether you’re building duty guns, casual plinkers, or match winners. Even the index is well laid out and useful. An excellent reference work and practical how-to manual
This is not a revision of Volume 1- and not a rehash of old military manuals!
This brand new super book is absolutely loaded with new & updated material, parts dimension & hardness specs, and the nuts and bolts tech data required to dimensionally inspect, restore, repair & build super accurate, super reliable, “blueprint” quality carry and competition grade M1911’s.
With Kuhnhausen’s original Volume 1 and the new Volume 2 – you have in hand more practical M1911 info & tech data than ever before published in the entire history of the U.S. M1911 & M1911A1 Pistols!
The U.S. M1911/M1911A1 Pistols and Commercial M1911 Type Pistols: A Shop Manual (Vol 2 in the Kuhnhausen .45 Auto Series): Jerry Kuhnhausen: Books – Volume 2 is the ultimate tech data manual for all M1911, M1911A1 & M1911 type Pistols-
A few of the highlights from this incredible book:
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Basic M1911 & M1911A1 Pistol design & operating theory
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M1911 design safety features
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Fully detailed and illustrated basic design function and cycle of operation section
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Bench function checks and disassembly/reassembly
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Full parts visual inspection data
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Full parts dimensional inspection data with- all critical ordnance parts dimensional specifications (the only M1911&A1 specs there ever were)
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Ordnance specified steels and specified parts hardnesses
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Basic tool and inspection gauge data
- Correct barrel and parts fit, including correct static and dynamic barrel clearance
- Building/assembling standard and improved performance M1911/M1911A1 Pistols
- Building/assembling accurized & optimum performance competition grade M1911’s
- And a whole lot more…
by Combat Rifle | Jun 3, 2015 | 1911 Pistol |
The Colt .45 Automatic. A Shop Manual, Volume 1. Jerry KuhnHausen
The Colt .45 Automatic. A Shop Manual, Volume 1. Jerry KuhnHausen
The Colt .45 Automatic. A Shop Manual, Volume 1. Jerry KuhnHausen is a detailed book which is extremely practical for every level of gunsmithing knowledge. This manual covers the 1911 from the lanyard loop to the barrel bushing. Contains useful information on inspection, part selection, part installation, trouble-shooting and function testing. Also shows tricks the pros use to turn stock 1911s into full-blown carry and race guns. Contains instructions and illustrations on assembly and dis-assembly, pitfalls to avoid and areas to check for the best performance.
The Colt .45 Automatic: A Shop Manual Volume 1 – By Jerry Kuhnhausen. A detailed book which is extremely practical for every level of gunsmithing knowledge. This manual covers the 1911 from the lanyard loop to the barrel bushing. Contains useful information on inspection, part selection, part installation, trouble-shooting and function testing. Also shows tricks the pros use to turn stock 1911s into full-blown carry and race guns. Contains instructions and illustrations on assembly and dis-assembly, pitfalls to avoid and areas to check for the best performance. 202 Pages – Softcover.
Almost every gunsmith, professional or amateur, has heard the name Jerry Kuhnhausen. For over 40 years, he’s been known as one of the best gunsmiths in the United States. For the past 20 years or so, Jerry’s been living in Idaho where he spends much of his time writing and publishing gunsmithing books. He has written 24 shop manuals and is an NRA life member.
Technical Information
Publisher: Heritage Gun Books
Date of Publication: 1990
Number of Pages: 202 Pages
Summary of Material:
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Covers troubleshooting & problem solving, parts inspections, and complete repair, rebuilding & accurizing of the Colt .45 Government Models, including Series 80’s, and the U.S. Military M1911 & M1911A1 Models. Also covers all copies and clones of the M1911 Pistol. Necessary tooling is also shown. Notes:
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Softcover
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9th Edition
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Photos and Line Drawing
222 pages with plastic laminated soft cover: With the expanded 9th edition, the original and time tested Colt 45 Auto/M1911 pistol bench manual is now in its 17th printing and remains the best bench inspection, trouble shooting, repair, hand fitting and basic accurizing manual ever published on the subject. Hundreds of photos and illustrations. Covers the Colt Government model, including series 80’s, and the U.S. Military M1911 and M1911A1 models. Includes the only really detailed instructions on fitting barrel and link that we’ve seen in print. With the popularity of the .45 still growing, this book will pay for itself many times over.
