Now I've bought some 500gn Westcastings and once again these are limited to 1700fps max.

I think this is going to be more easily achievable without going too light a load and having ignition problems. Anyone using AR2205 or AR2207 out there and have a load under this velocity?

I won't use a pistol powder and have already tried Trailboss - works fine for the 405gn (~1000fps) but doesn't stabilise the 500gn because I think they are going too slow (~900fps). Changing the load with Trailboss doesn't seem to have a large effect on the velocity.

[Mind you, even though half of 500gn / Trailboss loads went through the target sideways @ 100yds, they still "grouped" within 7MOA - close up pig hunting accuracy? Nah - I wouldn't try it]