"Colt" Barnaul Ammo

[RogerinTPA]

I can't imagine that barrel being done in only 20k unless there was some heavy firing schedules. I'm wondering what ammo and sights were used to get the 3" final grouping...

I'm of the opinion that my barrel wasn't shot out. I decided to change it out before it got to that point, for preventive maintenance and, coincidentally, Rainier Arms got the Medcon barrel I've been waiting for, back in stock.

https://www.rainierarms.com/?page=sh...roduct_id=3279

The ammo used before barrel replacement was 55 gr IMI M193, believe it or not, using a standard H-1 2 moa RDS shooting 5 shot groups. I know I should have done 10 rounds, but I was running out of time.

[BigLarge]

I bought 100 rnds of this stuff recently. No malfunctions from my 10.3" DD MK18. I was even able to make consistent hits on a 10" plate at 300 yards with my H1.

[markm]

The ammo used before barrel replacement was 55 gr IMI M193, believe it or not, using a standard H-1 2 moa RDS shooting 5 shot groups. I know I should have done 10 rounds, but I was running out of time.

I'm a 5 round group fan for most applications. We'll send a few more if we're seeing weird stuff.... but more than 5 and I start introducing too much shooter error.