Gunsmithing Longer Mags for a .338LM?

SavageLapua

Sergeant
Full Member
Minuteman
Jan 6, 2012
230
3
38
Alberta, Canada
I'm planning on ordering a Manners T4A for my Savage 110BA. I run Berger 300's that are seated too long for the magazine... I was just wondering if there is an out fit out there that builds a magazine with an internal length of 4".