This question is reference the 62 gr. Armor Piercing cartridge. At what barrel length would 95% to 100% of the powder be fully burned.
I have a lot of this ammo manufactured by FEDERAL.
My secondary question is about muzzle flash.......Is there a barrel length at which point there would be zero flash (Forgetting the utility of a 30 foot long barrel). Yes, I understand about drag slowing the bullet beyond the point of maximum velocity while still in the barrel.