Check the barrel stamping..
is it 5.56 or.223.
Colt Hbars are NORMALLY the NATO (MilSpec) chamber.
If .223 then chambered per SAAMI specs.
Contact Colt with SN and confirm chambering.
The "problem" was with your ammo...
I think that your shooting colleague was trying to warn you that Israeli 5.56 x 45 mm has a reputation for being loaded "hot." The only split case that I have ever shot was an Israeli round. You may never have a problem with it, but I did. HTH, Karl
A question about chamber length
Quote:
Originally Posted by
Col. Colt
On the top of the barrel in front of the front sight should be a stamping with the military designation - 5.56, C (chrome) and MP (proofed and Magnetic Particle inspected) and 1/7 (twist) - in which case it is totally safe to shoot with any NATO spec 5.56 Military round.
Colt's chambers have long been MilSpec, and they did not offer a "Commercial chamber" as did some of the clones. You could ask over on AR-15.com if anyone there knows of an exception. How is your barrel marked?
My Colt H-BAR is marked as you describe except it is 1/9 twist. My question is, when you reload for a 5.56 chambered rifle, should the overall length of the finished cartridge be longer than for a commercial chambered .223?
Sorry if it's a dumb question, I'm a novice at handloading.
I'm getting components and tools together to start reloading for my H-BAR and I want to get it right.