80gr Amax with Winchester748 recipe

[Sugarbug]

Ok, so we're sticking with mag length right now. My Lyman has an 80gr Jacketed HPBT load with an OAL of 2.550". Is this where I want to stay? Suggested starting grains: 21.8. Max: 24.0.

Components:

Virgin Lapua Brass
Remington 7 1/2 primers
Winchester 748 (all I could find)
Hornady AMax 80gr

Thanks, guys. Hoping to get these loaded tonight.

Rifle:
AR Direct Impingement
24" Krieger Heavy VarMatch barrel with 7.7 twist.