I'm having a custom built in a 280 Ackley Imp. Taking a quick invitory of powder on hand, I have four powders I could possibly start with to work up a load to get things started. R17, R26, H4831SC and possibly H4350.
I can get more R22 easily but with the temp instability issues people seem to have with this powder in the 280 Ackley IMP, I have decided to search elsewhere for an accuracy load.
Does anyone have any experience with any of these powders? If so, what kind of velocity and accuracy are you getting? What is your load recipe. I thought of trying the H4350, R17 in the 140gn Nosler BT. H4831sc or R26 with the 150 ABLR, or the 168 Bergers. Suggestions or helpful recommendation would be great.
