Originally Posted By: KDXThanks for the replys. Is it better to use the slower powders with this caliber? Would H335 be too fast? I have a bunch of it and finding different powders around here can be hit and miss.
H335 will be to fast of powder for the 257 ai, your better of with tryed and true IMR 4350, A min load would be used for fire forming and it can be used with 75 gr right up to 120's . You may use varget for fire forming aswell, but hunting rounds I'd see how 4350 shot, then go from there. Where are you in saskabush that powder is hard to get way North?
