I nearly scrapped that last barrel when it wouldn't shoot the 77gn SMK or NCC but once I figured out it would shoot the 75gn Hornady OTM I just ran with it.
What's the bullet number on that 75 gr OTM Hornady? I've not used it but it must have a different ogive than the A-Max, right?
I may need to give it a try.
I have a new gun & I'm just waiting on the scope & the Dyna Bore Coat to get here this week so I can break it in & start testing.
Planning to start with 77 gr NCC's & these powders:
H-4895, 8208, RL-15, AR Comp & MR-2000.
I use the 1st 3 now in both AR platforms & my bolt guns, but the last 2 are new for me & I may need to try a different bullet if the NCC's don't work as planned.