Reloading 6mm BRA questions

[DDuPont]

I have just commissioned a 6mm BRA rifle build and have a few questions regarding reloading equipment. My plan is to fire form by loading 6mm BR with Petersen brass. My question is what dies are needed? My intention is to load just load 6mm BR until I have 250-500 cases fire formed then switch to loading BRA. Will I need to buy a seater in both 6 and 6BRA? I plan to full length size will I need to buy this die in both bullet types? Are there any other concerns to be aware of or thoughts that need to be considered. Any help will be greatly appreciated.

 

[6BRA]

I have just commissioned a 6mm BRA rifle build and have a few questions regarding reloading equipment. My plan is to fire form by loading 6mm BR with Petersen brass. My question is what dies are needed? My intention is to load just load 6mm BR until I have 250-500 cases fire formed then switch to loading BRA. Will I need to buy a seater in both 6 and 6BRA? I plan to full length size will I need to buy this die in both bullet types? Are there any other concerns to be aware of or thoughts that need to be considered. Any help will be greatly appreciated.

6bra sizer and 6bra seater only. If chamber is cut properly, fireform with 105s and 30 gr of varget. Ackleys are supposed.to be cut .004 short, so the case is held in place by a slight crush on shoulder felt on bolt close. Pretty simple. No need to jam.

 

[Clancy]

You can seat with your BRA die.

There’s no need to FL size the new Peterson cases. Just poke a .240 or .241 mandrel in the neck and do your normal case prep.

Have fun!

 

[SKWERLZ]

You can seat with your BRA die.

There’s no need to FL size the new Peterson cases. Just poke a .240 or .241 mandrel in the neck and do your normal case prep.

Have fun!

This!
I use Peterson brass for my 6BRA and it’s been good.

 

[Nellej12]

They will shoot very well as a BR when fireforming too from my experience! So if you have a local match use it there when fireforming.

 

[SKWERLZ]

They will shoot very well as a BR when fireforming too from my experience! So if you have a local match use it there when fireforming.

Yep

 

[64Rambler]

You can also probably use your 6BR die to size enough of the neck for a 2nd and 3rd firing on a couple of cases (with fireforming load, nothing too hot) and send your 3X fired brass to get a die that best matches your chamber. I started with a Wilson bushing die and found that, compared to my chamber, it sized the body at the shoulder about 0.0005" more than is sized the body at the 0.200 line, creating a more tapered case than the chamber. I sent my brass to Harrell's and then sent me back a die that perfectly matches my chamber, and I can get away with as little as a 0.0005" bump, but usually bump 0.0015 to 0.0020"

 

[Lance21]

Use a 6 dasher seating die. Works perfectly.

 

[Ackman]

Easiest way to get 6bra is to buy 6BRA brass from Alpha. works very well.

 

[DDuPont]

Thanks for all the help. My gunsmith has won F-class championships so I’m sure everything will be done to spec. He is actually preparing for an upcoming match so I haven’t been able to consult with about this. Again thanks for the help

 

[Clancy]

Easiest way to get 6bra is to buy 6BRA brass from Alpha. works very well.

Does not work with my reamer and many others.

 

[Ccrider]

I have just commissioned a 6mm BRA rifle build and have a few questions regarding reloading equipment. My plan is to fire form by loading 6mm BR with Petersen brass. My question is what dies are needed? My intention is to load just load 6mm BR until I have 250-500 cases fire formed then switch to loading BRA. Will I need to buy a seater in both 6 and 6BRA? I plan to full length size will I need to buy this die in both bullet types? Are there any other concerns to be aware of or thoughts that need to be considered. Any help will be greatly appreciated.

What size neck?