Well, when I load bergers I never worry about the OAL on the cartridge. It is not important, just go by your lands and play with seating depth 0.01jammed into l&g's then work your way out. OAL is kinda redundant with bergers
Sorry guys, I should have said - this is more about the mag box than anything else. I'm waiting to get my new rifle just finished by Chad Dixon. I know he used a Wyatt extended box which has an internal length of 3.825 inches. I'm trying to establish whether there will be enough length in that box to -
1. Initially seat the bergers right out so I can use a full case of powder and
2. Progressivly increase the OAL of my rounds as the throat wears.