Thread: Howa Mini 223 COAL, loads etc

Mine was a 1:9. A 65gr SGK would touch the rifling at 2.320" COAL, if my notes are correct.

763 is quite slow for caibre, it gets really good speed at the top end (I got 55's up to 3400 in a 24" barrel, up around 29gr iirc) but ignition was quite erratic since it's just so slow. Much below max, the cases necks were so dirty that it was obvious they weren't obturating fully. Kinda all or nothing with that weight of bullet. Muzzle blast was pretty violent too - you'd think I was shooting a 308 and it'd be even worse in a shorter barrel.

Might be a bit better with a 62, but a case full of 2206H or 8208 would still be my pick. Much cleaner burning and still good speeds.