New Krieger 300 win mag, what to tell Krieger about the chamber?

[Maestro Pistolero]

I am having a 300 Win mag built on an SPS. The new rifle will go to Krieger for barreling. At this point, I am not loading my own yet. My intention is for this to be a long range rifle, say 700 to 1200 yards. Given that I will be using factory match ammo for the time being, what load and what chambering instructions should I tell Krieger? Sammi specs, or?

 

[turbo54]

I'd tell them:

you want a chamber that isn't going to require any special case prep... no neck turning, no super duper tight headspace, no super "tight" chambers
If you plan on using the rifle as a repeater, and if so, what the longest COAL your magazines will accomodate - and that you'd like a little room to "chase the lands" in the future
That you plan to use bullets between 190gr and 210gr (this is MY assumption, edit as necessary)

 

[Maestro Pistolero]

Great reply, thanks. Very helpful.

My limited rifle experience has all been with .308. For my M1A, and my AR10 the ammo choices have been easy. Once I got the results I wanted from FGM/SMK 168s or 175s, I stopped looking. Is there a similar 'go-to' load for 300 WM?

 

[turbo54]

I'm not a 300WM guy, but I think federal offers GMM 190gr, with the 190smk.

While far superior to a 308 loaded with 168s and 175s, it's a far cry from what the mighty 300 can do with custom ammo. I think 208gr is about where most 300 shooters get started, and the cartridge has plenty of horsepower to drive them.

 

[Edds]

......... what load and what chambering instructions should I tell Krieger? Sammi specs, or?

The first thing you should do is ask them what chambering options are available from them.