Thread: Subsonic .223rem

Originally Posted by shooternz

Drop the bullet weight to 35 or 40 grains the heavier bullets are too long to stabilise at sub velocity, The only .22 centre fire cartridge that is viable for subsonic is the .22 Hornet
the case capacity of the .223 is too big and the powder charge would so small making it difficult to be consistent, With Red Dot 700x Trail Boss it is about 3.5 grains or less

When you are talking about still effective killing you would need at least 7gr's otherwise it would dribble out of the barrel. My mate has 9 baffles on his DPT can. It is very quiet.

Originally Posted by TeRei

When you are talking about still effective killing you would need at least 7gr's otherwise it would dribble out of the barrel. My mate has 9 baffles on his DPT can. It is very quiet.

With a 45 grain cast bullet and 5.2 grains of Red dot the velocity is 1795fps hardly subsonic it would be slower with a jacketed bullet but not by much