Hi,

I am into my first build, have a Kreiger barrel on the way, and plan on getting an action from Northland to put together a 300 wm. First, if the mag box is 3.450 (correct me if I'm wrong on that), how long can my cartridge be and still cycle well?

Second, once I know how long my cartridge can be, do I have to take a bullet that I plan on using (190 berger vld), seat the bullet to that length, and find out how long the freebore can be so that the bullet sits within .010 of the lands? I'm just worried that I'll spend all this time getting the parts for this build, and when I take it to the gunsmith to be threaded and chambered, I'll get it back and find out that I can't get anywhere near the lands.

I think if there is an aftermarket replacement mag box that is longer like I've seen for Rem 700s and Winchesters, then I wouldn't have to worry. If they have them for savages, let me know. Or is it possible to just cut away a portion of the front of the mag box?

Any and all info to help with my anxiety here would be greatly appreciated. BTW, does everyone deal with these issues when having a new barrel chambered?

Thanks,
Matt