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I do not quite have the case capacity that ya'll do, and so far with 3n38 and 2400, the velocities were lower then QL predicted. atleast with the heavy projectiles. it is real close with the lighter projectile. I do not have the case capacity that ya'll have. but the 300 whisper is the closet thing to what I have am doing. so I came here to get as much knowledge as I can to apply it to my setup.....that and I eventually want to 300 whisper bolt action.
Using N110, 6.7grn for 99% case capacity, quickloads shows I'll have 1063 velocity, but if it holds true with other powders so far, I expect that to be about 800fps range in actuality with 200grn SMK. pressure at the gas port looks like it will cycle unsurpressed........
This is a fun project, sometimes I think a 300 Whisper AR would have been an easier build for subsonic shooting......but then I would not have the supper cheap plinking ammo.
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Hybrid Mode
