Gunsmithing 6BR chamber recommendations

[Jarrodb1975]

I’m thinking of giving 6BR a try for next PRS season. I’ll be moving from a 6 creedmoor. Mainly for little less recoil and powder savings. My question is what chamber specs would you guys recommend? I plan on using Berger 105 hybrids with Laupa brass. I have explored the possibility of a prefit but I have always had gunsmiths shoulder my barrels. What kind of experience have you guys had. My action is a Bighorn Origin.
Thanks

 

[47guy]

Standard reamer with .104 freebore and .274-.275 neck will work...if you want a little more room in your case go .120-.130 on the freebore

 

[FatBoy]

We have used a standard off the shelf PTG 6BR Norma reamer for years in 1:8 twist barrels. Shoots 105s and 107s great from Lapua brass. Easiest caliber I have ever loaded for. Takes zero effort to shoot in the .3s

 

[delfuego]

Zero freebore, no turn neck and Harrell's dies. PM me if you need smith.

 

[Jarrodb1975]

My smith has a 113 FB with 272 neck. Seems like that would be ok. Would like little bit more.

 

[mmlj]

Is the 6BRA another option for you? I don't have any experience with it, but it seems like another option for increased performance with ease of using standard 6BR brass. I'm trying to talk myself into using either cartridge.

 

[47guy]

Is the 6BRA another option for you? I don't have any experience with it, but it seems like another option for increased performance with ease of using standard 6BR brass. I'm trying to talk myself into using either cartridge.

BRA

 

[Professor Oblivion]

I'm thinking about going 6BR as well. One thing I want to check on here is: are "6BR" and "6BR Norma" indeed the same case, or are there dimensional differences à la Lapua Dasher vs. Norma Dasher?
Thanks

 

[Tokay444]

I'm thinking about going 6BR as well. One thing I want to check on here is: are "6BR" and "6BR Norma" indeed the same case, or are there dimensional differences à la Lapua Dasher vs. Norma Dasher?
Thanks

BR Remington is a shorter case by .040" than BR Norma.
I'm not sure about Lapua or Norma making Dasher brass.

 

[Professor Oblivion]

BR Remington is a shorter case by .040" than BR Norma.
I'm not sure about Lapua or Norma making Dasher brass.

Thanks for the help. Norma makes Dasher brass (https://www.grafs.com/retail/catalog/product/productId/77530), but you're right, AFIK, you have to fire or hydro form Lapua Dasher.

 

[47guy]

Peterson Brass 6mm Dasher Unprimed Box of 50 - Graf & Sons

All 50 count listings of Peterson Cartridge casings come in one of their plastic ammo boxes. Made in the U.S.A. Featuring a 40-degree Ackley-type shoulder and 10 percent more case capacity over the parent 6mm BR case, the 6mm Dasher has been used to set records in the 600 and 1,000-yard...

www.grafs.com

 

[Dthomas3523]

If you’re gonna custom order a reamer, go with .274/.275 neck and .104 or zero freebore.

Smith can always throat more freebore and the .274 or .275 neck will allow you to run into a batch of brass thats .014 without issue.

 

[Tokay444]

Thanks for the help. Norma makes Dasher brass (https://www.grafs.com/retail/catalog/product/productId/77530), but you're right, AFIK, you have to fire or hydro form Lapua Dasher.

Ahhhhhhh, this is the long neck stuff Pynch alluded to in one the VP Precision podcasts.
That seems like it would be a winner if the Norma brass was reported to be so shit.

 

[high right]

My Reamer is .080 free bore. I run 105s and don't give up ANY case volume.

 

[agshooter]

I have same experience with 0.094 freebore. I see no need for the 0.1+ freebore.