308 subsonic IMR 4064

[M24_SWS]

I have a SPS Varmint 308 cut to 20 inches, the Barrel twist rate is 1/12. I started the process for a AAC Cyclone supressor.
I have hornady 150 grain round nose bullets and a batch of IMR 4064 powder.
Does anyone have a good subsonic load with the materials I mentioned?

I did some searching but did not find what I was looking for. So I am asking for some help.

Thank you,

Heath

 

[SSSamurai]

My understanding is that it would be dangerous to lower your powder level to the point where you would be subsonic. Too little powder in a case can lead to secondary detonation and blow up your gun. Get some Trail Boss and you'll find a ton more info

 

[M24_SWS]

Trail boss is not available to me but I have some SR4759 and titegroup......not sure how those would work with a 150 RN.