Milspec is 28.5gr of WC844, which is the military equivalence of H335. I've run that in some of my 5.56 chambers, but it's too hot for a gas gun with a .223 Chamber.
My standard load is 27.5gr with a 55gr NBT, however when using the Vmax, I find it necessary to drop back another gain.
Keep in mind, this was with Mil surplus powder, so it's possible my lot was a little on the cold side.
H335 is highly temperature sensative, so now that I've used up that 8 pounds I'm looking at the more modern powders. TAC and LT32 are looking very promising.
