Thread: Subsonic project

Originally Posted by shooternz

Only tried a few loads with AP 70 don't have enough to do serious load development with it but 7.0 grains went well
velocity was in the 900fps range,
For full power loads I use 2400, Some of my customers use 21.0 grains of 2205 in their Freedom arms revolvers for Handgun Silhouette
I have seen some impressive shooting at 200 metres with that load velocity out of a 7.5" barrel is over 1200 fps.

I use old ICI Nobel Shotgun Powder No 78 which I have a qty of. Done a lot of load dev for various calibres based on Red Dot data given Red Dot is very close in burnnrate and composition of powder. And Red Dot being the original famous "The Load" powder. You can Google this for details. Been very successful with No78 across Pistol and Rifle calibres. In Rifle the 6 to 13 gn range provides velocity in the 900 to 1800 fps range. E.g. in 303B around 11 gn gives mid 1500s fps and very accurate with @shooternz 215gn GC projectiles. AP70N is in the same performance range I believe, as are other similar Shotgun powders. But please do your own research and careful load dev..I do not use any fillers or packers. I note also that ADI lists reduced velocity load data for some rifle calibres using AS30N. I believe this is very close to Red Dot and the Nobel Powder I use.