February 24th, 2019

Primer Pocket Rocket — Another Reason to Use Eye Protection

Primer Blown Gas defect winchester casehead

A few years back, Our friend Grant Guess had a “close encounter” with a bad primer. An apparently defective primer caused part of the casehead on one of his rounds to blow out. This, in turn, allowed high pressure gas to vent through the damaged primer pocket. Take a good look, boys and girls. This is yet another very good reason to wear safety glasses. The cartridge was a 6.5-06, handloaded in necked-down Winchester-headstamp .270 Win brass. Grant reports:

“I had a blow through between the primer and the primer pocket today. The action was really smoking and I got a face full of gas. This was a reasonably light charge. Thank God for safety glasses.

I should also mention that it appears there is a 3/64 hole that is halfway between the primer and the primer pocket. Like it burned a small jet hole through both of them.”

Could this happen to you? It just might. On seeing this damaged case, one of Grant’s Facebook friends, Chris D., observed: “Search the internet, you will see a lot of these pin hole ‘in the corner’ failures. Obviously Winchester has some issues with the LR primers.”

Careful Examination Reveals Apparent Primer Defect
After this incident, Grant examined the damaged case: “I pinned the flash hole and it is not over-sized or under-sized. The primer clearly has an area where it had a defect. At [50,000 CUP], it doesn’t take much of a defect to cause issues. There was a slight bit of pucker-factor on the next shot….”

Primer Blown Gas defect winchester casehead

Permalink Bullets, Brass, Ammo, Tech Tip 8 Comments »
February 24th, 2019

Teaching New Shooters — CMP Training Resources

The CMP (Civilian Marksmanship Program) offers a wide variety of resources for novice shooters and juniors. These materials help novices learn basic marksmanship skills and get started in competition. Some resources can be downloaded from the CMP website, while others are available for purchase from the CMP E-Store. In addition, The CMP maintains a Coaching Resources webpage with dozens of informative articles. Here are some of the CMP articles you can find online:

teaching shooting positions youth junior

Videos

These short marksmanship trainging videos cover the basics of the Kneeling, Standing, and Prone postions. (NOTE: these are live links — videos will launch when you click.)

Power Point Presentations

Right-click and “save as” the links below to download these Powerpoint presentations to your computer. These can be used in a classroom/seminar setting, or can be reviewed by shooters on their own. NOTE: Clinking a link will initiate the download to your default download folder!

CMP PRINT RESOURCES

Coaching Young Rifle Shooters
Gary Anderson, DCME, has authored a great book on instructing junior shooters. This full-color, 200-page treatise is probably the most comprehensive marksmanship coaching guide in print. The author, Gary Anderson, knows something about high-level competition — over his illustrious career he captured two Olympic gold medals, won seven World Championships, set six world records, and held 16 national titles. In this book, Gary provides coaches with all the tools and techniques needed to help young shooters (and novices) improve their skills. Packed with useful illustrations, this 200-page book sells for $19.95 plus S&H through the CMP E-Store.

USAMU Service Rifle Marksmanship Guide
and USAMU Advanced Pistol Guide

These illustrated books, written by U.S. Army Marksmanship Team personnel, provide detailed instructions on the basic and advanced skills of High Power service rifle shooting and service pistol and bullseye pistol target shooting. The books cost $6.95 each through the CMP E-Store.

Permalink Competition, Shooting Skills No Comments »
February 24th, 2019

Billiard Chalks — Fun, Challenging Reactive Targets

AccurateShooter Billiard Chalks targets

Reactive targets — whether balloons, steel gongs, or clay birds — always add fun to a range session. But precision shooters may want something more challenging (i.e. smaller) than a clay bird when shooting inside 300 yards. For a change of pace, try shooting at inexpensive pool cue chalks. Less than 1″ square, these will test your marksmanship skills. (If you need a bigger target, that also makes a nice puff of “smoke”, try charcoal briquettes).

Pool Cue Chalks — Cheap, Fun, Dramatic

If you’re looking for a small target that makes a nice big cloud of color when hit, try billiard chalks — those little blue cubes you use to dust the end of pool cues. Measuring about 7/8″ per side, billiard chalks make very challenging targets at 100 and 200 yards. When you hit them, if you nail the circular “dimple” in the middle, they disintegrate impressively, tossing blue “smoke” in all directions. Billiard chalks are inexpensive. You can buy a dozen chalks online for about $3.00 — just 25 cents each. And the prices drop with more quantity. One gross of chalks (that’s 144 pieces) costs just $24.95 at ozonebilliards.com. That’s 17 cents each.

To see actual hits on chalk at 100 and 200 yards, watch the video below. (WARNING: Soundtrack is loud and advertisement may play before movie. Flash plug-in required for playback, so you may see a note that a Flash file is loading.) The movie-maker cautions that: “You’ll notice (in the video) that some of the hits are ‘wiffs’ instead of ‘poofs’. If you look at the picture above, you’ll see the 1/2 inch dimple in the cube face. If you don’t put the bullet in that dimple, it’ll ‘wiff’ on you.”

(more…)

Permalink - Videos, Shooting Skills 3 Comments »