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August 21st, 2020

.300 Blackout Fired in .223 Rem — Mistake Is Disasterous

.300 AAC Blackout 300 BLK kaboom accident blowup cartridge failure barrel .223 Rem 5.56
Photos and Facebook post by Tactical Rifle Shooters

Yet another .300 Blackout disaster. Unfortunately, that .300 Blackout cartridge can fit in a .223 Rem chamber. Shooting a .308-caliber bullet in .223 bore is a recipe for disaster.

.300 AAC Blackout 300 BLK kaboom accident blowup cartridge failure barrel .223 Rem 5.56

.300 AAC Blackout 300 BLK kaboom accident blowup cartridge failure barrel .223 Rem 5.56 The .300 AAC Blackout aka “300 BLK”, is a compact 30-caliber cartridge designed to work in AR-15 rifles. It has a shorter cartridge case to accommodate the bigger 30-caliber bullet while still fitting in a standard AR-15 magazine. Unfortunately, that’s the danger. A careless shooter can toss a .300 Blackout cartridge in with .223 Rem rounds without noting. And because the case-head size is the same as the .223 Rem (5.56×45) the rifle’s bolt assembly will happily chamber and fire the .300 BLK round. Problem is, that forces a .308 diameter bullet down an undersized .223-caliber bore. Not good!

This images were provided by Tactical Rifle Shooters on Facebook. The message was clear: “Don’t try to run 300 Blackout in your .223/5.56mm. It won’t end well. The problem is identical rifles and identical magazines but different calibers.”

Image from Accurate Shooter Forum. Cutaway shows the jammed .30-Cal bullet:
.300 AAC Blackout 300 BLK kaboom accident blowup cartridge failure barrel .223 Rem 5.56

For those who MUST have a .300 Blackout, here are some things you can do:

1. Use different colored magazines for .300 Blackout vs. .223 Rem.
2. Fit all your uppers with caliber-labeled ejection port covers.
3. Mark .223 Rem upper handguards with the caliber in bright paint.
4. Mark all .300 BLK Rounds with heavy black marker.

.300 AAC Blackout 300 BLK kaboom accident blowup cartridge failure barrel .223 Rem 5.56

Comments by Folks Who Viewed these .300 Blackout Disaster Photos:

“The .300 Blackout is simply a badly-designed round. A properly-designed round would have had a feature in the shape that would have prevented cross loading in the first place.” — D. Santiago

“I almost made that mistake… I had a magazine of 300 BLK inserted in my .223/5.56 all night. Fortunately, I never pulled the trigger. Once I realized the mistake, I almost got ill. [After that incident] I no longer own a 300 BLK.” — B. Welch

“Happened to me hog hunting from a helo. Gun exploded in my face.” — B. Hood

“Fire-forming projectiles [is] so wrong in centerfire!” — M. Stres

“Had some dude come into the store the other day wanting .300 Blackout ammo to shoot in his 5.56 AR. It took 15 minutes of explaining for him to understand you got to have a .300 Blackout Upper!” — R. Williams

Permalink - Articles, Bullets, Brass, Ammo, Gunsmithing, Tech Tip 3 Comments »

August 21st, 2020

Hornady Precision Hunter Steel Challenge in Colorado

The inaugural Hornady Precision Hunter Steel Challenge took place in Colorado August 8 and 9. This unique competition involved lots of hiking with various shooting positions in challenging natural terrain. The unique match was hosted at the Cameo Shooting Complex near Grand Junction, CO.

There were 135 registered competitors — quite a turn-out for a physically demanding match in a fairly remote location. Congrats to Heavy Class and Overall Winner Brian Black who topped the field with 140 Match points (100% of possible). Brian shot a 6.5×47 Lapua with Berger 6.5mm 140gr Hybrids. Brian’s winning rig featured a Lone Peak Arms Fuzion action, Benchmark barrel, and XLR Element chassis. Behind Brian was Serger Ducourneau in second with 134 points (95.71%). Eric Anderson finished third overall with 129 points (92.14%).

Overall and Heavy Class winner Brian Black (center) with trophy.

The Hornady Precision Hunter Steel Challenge tests a rifleman’s fitness and skills as marksman and hunter. The stages were blind with a 4-minute time limit to move to the shooting area, locate, range, and engage targets. Shooters could choose between two rifle weight classes (light or heavy) and had to meet a minimum power factor cartridge requirement that helped even the playing field. The match featured a diverse course of fire with a good mix of prone and natural terrain shooting positions. Look at the images — this was no ordinary shooting match, and natural terrain features were employed much more than at any PRS match.

Hornady wanted to thank Match Director, Scott Satterlee, the Cameo Shooting Complex and all of the volunteers and sponsors that made this match possible.