I beat most factory loads with AA2200 and Im using a Bison barrel, not ARP. I haven't played around with 120's cause those bastards are expensive to shoot. I got 2450 with Cavity Back 120s and was happy. I can develop my 110/105 load cause S&B FMJ 110s have the same ballistic performance as the 105 MKZ. At this point I'm just playing around with COAL on the rounds. Im happy with 30 grains and its accurate.This is interesting. I’ve always wondered why we couldn’t beat factory loads with 2200. The Hornady 270 Win Custom Lite 120gr SST is listed at 2675fps @24” bbl. admittedly a downloaded cartridge, but your loads are starting to approach 270 Win territory. We should highlight that this is out of not only an ARP barrel, but a 3R which was designed to reduce pressure (engraving force is the term I believe) for heavier gr bullets in 6.8.