I checked my loading manuals- my 44th edition Lyman shows an accuracy load with the Lyman 257420 bullet Bullet + GC @ 69 gr #2 alloy, of 13 gr IMR 4198. It also shows 5 to 6 gr of unique, or 9 to 11 gr of 2400. Although my newer books dont show it, Lyman made a 87-89 gr bullet #257312 that may still be an available mold, the accuracy load there was 5.5 gr Unique, @ 1625 fps. Let us know how it turns out.