Chambering for factory 6mm br Lapua 90 gr Scenar

[Joseph Batel]

Hello, new to Accurate Shooter.
But I’ve been reading every thing I can about 6 mm br.
Building a 6mm br for my 60th birthday ... Ive been a very good boy.
I have on order a Bat VA action. I purchased a Krieger 1-10, 6mm 1.25 strait contour barrel.
And my McMillian ATH stock is on the way.
When I ordered the barrel, Krieger said 90 grain is the sweet spot for the 10 twist for 6br.
I don’t reload yet so I’ll start with the factory Lapua 90 gr. Scenar.
Krieger said when I start to reload the 87gr Vmax will do very well for chucks.
What size should I have the smith cut the chamber?
I’ll give the smith the factory 90 gr. Lapua. How far off the the lands should I have him set the throat?
When I reload I’ll be able to adjust the seating depth of the 87 gr Vmax as needed.
Thanks in advance. This site seems to be “The place to go” for 6mm br info!
Joe. B

 

[sdean]

Probably should be asking your gunsmith these guestions? Also quit buying stuff until you get some answers. Don't know your intended purpose for your gun but that's a lot of barrel to pack around.

 

[Joseph Batel]

75% target.
Most of the time it will go from case to shooting bench. I’ve got out to 200 yards locally.
I’d like to develop a varment load. But again, I go from truck to portable shooting table. Im going to do a heavy spiral flute on the barrel, so it should lighten it up.
Thanks for your reply

 

[Murray Brook]

http://www.6mmbr.com/10twistbarrels.html

 

[NorCalMikie]

One thing to concentrate on is "freebore" Too long and you can't go back!!
And it won't be too long shooting and you won't be close to the lands anymore.
I go short but I roll my own ammo. My rounds are stuffed into the lands with the lightest bullets I can get my hands on. Then, I go to heavier bullets as the throat wears. Good luck with your project. You might consider reloading your own ammo, that way you get what you want.
Shooting a 6 BR "accuracy wise" can get boring real fast so plan on taking another rig when you go shooting. Bugholes are the norm.

 

[Joseph Batel]

Thanks so much for the reply’s.
The article on 10 twist was very informative.
Think I’ll have my smith cut the throat tight for the factory 90gr Lapua.
I’ll start my reloading wth the 87gr. VMax.
Might also try the 75.gr VMax
This going to be fun.
Thanks again

 

[Ccrider]

You want be disappointed with the 87 v max.