Anyone come up with a action Cycling Subsonic Load yet

[Rambozo]

TXgunner
have you tryed H322 .. According to the hodgdon burn rate chart its next to
AA2015.. Just curious as I have alot of H322
any reason not to try it like heat sensitive or not good for reduced loads?

Thanks
Smoke

H322 is a great powder. It's my favorite, but it's fairly fast burning, and you will likely run into load density problems and port pressure problems. In my experience, the powder isn't very temp sensitive. It's a Hodgdon "extreme" powder.

Personally, I would look at slower burning powders, maybe even something that would be used in a heavy magnum cartridge. I'm sure you can find something that offers a good fill, low velocity, and slow enough burning for port pressure. at the same time though, I have heard of secondary pressure spikes due to using too slow of a powder relative to projectile weight. I don't know how much of an issue that would be with lapua 144s and the 6.5 bore volume of the grendel though.

anyway, just some thoughts.