338 Norma Mag?

[diderr]

What are your thoughts and opinions on this caliber? I have a McMillan TAC-338 and am limited to a 3.6" coal with my magazine. I'm only getting sub-decent accuracy with my Matchking 250 loads and still being able to use my magazine (3/4 moa). I really want to shoot the 300 Bergers. The barrel I have on it already has 5-600 down the tube, and just been thinking about re-barreling it. I've been looking at a Brux 1-9.5. I think I'd go 28" or 30" on the finish length.
Thanks.

 

[Brasscow]

It's a superb cartridge. Brass is also spectacular IMO. You've got the right idea on the barrel. Dave Tooley is an expert on this and 300 norma mag and I believe he says 26" is prescribed as the optimal barrel length, but don't tell that to my 29" barrel. Berger 300 otms at 2815 ahead of 92gr of retumbo.

Do it. And do it right away.

 

[diderr]

It's a superb cartridge. Brass is also spectacular IMO. You've got the right idea on the barrel. Dave Tooley is an expert on this and 300 norma mag and I believe he says 26" is prescribed as the optimal barrel length, but don't tell that to my 29" barrel. Berger 300 otms at 2815 ahead of 92gr of retumbo.

Do it. And do it right away.

What COAL you running?

 

[338Norma]

What are your thoughts and opinions on this caliber? I have a McMillan TAC-338 and am limited to a 3.6" coal with my magazine. I'm only getting sub-decent accuracy with my Matchking 250 loads and still being able to use my magazine (3/4 moa). I really want to shoot the 300 Bergers. The barrel I have on it already has 5-600 down the tube, and just been thinking about re-barreling it. I've been looking at a Brux 1-9.5. I think I'd go 28" or 30" on the finish length.
Thanks.

If yours was cut with a standard reamer it will put you under 3.6 with a 300 SMK both of mine are 3.580 10thou off

 

[Brasscow]

What COAL you running?

Well, my reamer is a 338 norma usa reamer, which has more freebore than normal - so take that for what its worth. I'm at 3.74" OAL.

If you want to be able to touch the lands at mag length you may want to consider the 300 norma mag since you're limited to 3.6". Or just ask for a 338 norma reamer with less freebore. Even seated deeper i think you'd be fine. Im not crunching powder at 92gr of retumbo.

 

[garandman]

I would love to hear all your various loads.

I had Southern Precision build me a 338 Norma. Haven't had time or opportunity to shoot it much.

 

[diderr]

Well, my reamer is a 338 norma usa reamer, which has more freebore than normal - so take that for what its worth. I'm at 3.74" OAL.

If you want to be able to touch the lands at mag length you may want to consider the 300 norma mag since you're limited to 3.6". Or just ask for a 338 norma reamer with less freebore. Even seated deeper i think you'd be fine. Im not crunching powder at 92gr of retumbo.

What velocity are you getting?

 

[Brasscow]

What velocity are you getting?

It's a superb cartridge. Brass is also spectacular IMO. You've got the right idea on the barrel. Dave Tooley is an expert on this and 300 norma mag and I believe he says 26" is prescribed as the optimal barrel length, but don't tell that to my 29" barrel. Berger 300 otms at 2815 ahead of 92gr of retumbo.

Do it. And do it right away.

2815fps

 

[diderr]

Just ordered my 9.5 Brux from Bugholes! Going to get me a set of Forster dies. Now to decide if I want to leave it at 31" or cut it down to 28".
What RCBS shell holder does the Norma Mag need?

 

[xdeano]

Im running a rcbs #48 shell holder.
Xdeano