Mike,

hat a beautiful rifle and very nicely refinished. Who did the work did a great job.

What is the difference between the 450.400 3" and 450/400 3 1/4"? I guess I thought the 3" version was just the same cartride but just 1/4" shorter. If that is correct, what would rechambering do? I ask because I have reloaded 450/400 3 1/4" BPE ammo with a 3" die set.