![]() ![]() But I've clocked some reloaded ammo that was just as bad. The ES and SD of both were not what I call acceptable. I see 52, 55, and 75gr and they are targeting all of them at 1010.ģ) What manufacturer of 300BLK 220? I clocked Remington factory 220s at 1091-1167 with an average of 1126 from a 16" barrel, the same ammo went 869-971fps from a 9" barrel. Thank you.ġ) Have you Chronographed any of the mentioned ammo? Or are you basing everything on your ear and manufacturer claims?Ģ) I don't see a 60 gr. So, in both cases, a longer than normal barrel was used.Īny information from you guys will help. 223 sub was shot from a suppressed 20" barrel, 1:9 twist. So, maybe shooting 300 Blackout subs from a suppressed 16" barrel would cause the round to gain some velocity? Also, the. What the heck? Under what conditions will a subsonic round turn supersonic, and how can I fix this? Is it the longer barrel? Usually, 300 Blackout subs are shot from 10.5" barrels with suppressors. 223 subs, and they were very quiet, but I heard a sonic crack from both rounds. I just stepped out back and popped off a few of the. 223's since most of my targets are 50 yards or closer. ![]() 22LR), but I need something more powerful than. I shoot a lot of varmints at night (suppressed. 223 subsonic 60 grain rounds I purchased from Beck Ammunition. The same thing happened this morning with some. 22LR's, and there isn't a sonic crack, and there shouldn't be. The report from the muzzle is very quiet, but I'm still getting a sonic crack when the rounds are fired. I am shooting 300 Blackout subsonic rounds (220 grain) through a 16" barrel with a 7.5" suppressor. I have an issue with a couple different types of ammo. ![]()
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