Thread: .223 Subsonic

Originally Posted by woods223

So, looked at notes.Howa 16' 1:8 barrel with Sonic 35 suppressor.
AS50N powder. Currently loading 7.3gr powder under 55gr Hornady V-Max. av vel. 1911 fps @ 10m. 5mm/3 shot group @ 50m. Kills goats @50m and reasonably quiet.
Have tried loads from 7-7.9gr. 7gr was still supersonic and 7mm groups, 7.9 was 2026 fps, 7mm group.
Red Dot powder, have tried from 8 down to 4gr powder under same projectiles. 6gr RD was about 1700fps. Can't find target at moment but 4gr is subsonic but ES was a bit erratic. Havn't persisted with this load for now but will try and fine tune at some point. 5gr is super sonic, worked on two magpies at around 50m this morning.
Hope this gives you some idea where to start possibly @BOBINNZ
Don't know if @shooternz on here casts 22 projectiles, gas checked, but he might be worth asking.

Probably should have mentioned that the 7.3gr AS50N load shoots near enough dead on @ 50m without altering scope from normal HV ammo setting for Belmont Black.