6 bra fire form with 70 grain bullets?

[chop house]

i have an excess of 70 tnt. to do the conversion from 6 br what powder/load would be safe and successful?

 

[gunsandgunsmithing]

i have an excess of 70 tnt. to do the conversion from 6 br what powder/load would be safe and successful?

Several should work well. What powders do you have? N135 and h322 are both great in a 6br with light bullets and some have good luck with h335

 

[chop house]

Several should work well. What powders do you have? N135 and h322 are both great in a 6br with light bullets and some have good luck with h335

have n133, n135, h322 and h335. my lt-32 and 8208xbr are too precious, however.

 

[gunsandgunsmithing]

have n133, n135, h322 and h335. my lt-32 and 8208xbr are too precious, however.

About 32.0 of n135 or 30.8 of h322 are both pretty commonly used areas for powder charge in a 6br with light bullets and they typically shoot great right around there. Neither is super hot but ya might work up to both/either in your rifle, as usual. If you can reach them, I'd start either a bit into the lands...about .010 to just touching. You might fall in love with the light bullets! I'm with ya on the LT32 and 8208!

 

[Big Mc]

i have an excess of 70 tnt. to do the conversion from 6 br what powder/load would be safe and successful?

Seat em deep and you will be fine. Tommy Mc

 

[chop house]

Seat em deep and you will be fine. Tommy Mc

deep into the lands or deep in the case?

 

[JMayo]

My bra is tight on a new br case. I don't have to worry with seating depth when fire forming. Matter of fact a proud primmer will stop bolt closure.
I used some 90's i have. I used varget 28 grains
I wasnt doing load development save didn't care where they went on the target.
I've learned to do load development even when ff.
It shoots very well from the start.

 

[Big Mc]

deep into the lands or deep in the case?

In the LANDS.. Plenty of JAM/ Tommy Mc

 

[chop house]

In the LANDS.. Plenty of JAM/ Tommy Mc

thanks. that is how i read it, but you know language is a funny thing.

 

[Big Mc]

thanks. that is how i read it, but you know language is a funny thing.

You will be fine. Rember it is only MONEY.. Tommy Mc

 

[gunsandgunsmithing]

fwiw, the .010 to just touching the lands reference I made was in regard to that bullet seeming to shoot well there and not for the purpose of holding the case against the bolt. I always setup any Ackley style case to have a slight amount of crush fit on the parent case and I don't like to rely on jamb for this. Some have good results but I have had misfires galore that way. So, if no crush in your chamber, I'd create a tiny false shoulder on the neck but that's just me. That way works best for me. With a BRA, you may well not need anything other than load and shoot. That was the intention, I believe. Not saying other ways won't work.

 

[CaptainMal]

Just shoot with anything. The BR case has the same headspace as the BRA will be. They touch at the chamber shoulder at the top of the shoulder. Unlike converting to a Dasher where you have to heavily jam or do a "false shoulder" method, the BRA just takes a BR round of most anything.

I use just a few grains lower than normal with a cheap bullet, firearm while shooting club matches or steel matches.

 

[gunsandgunsmithing]

Just shoot with anything. The BR case has the same headspace as the BRA will be. They touch at the chamber shoulder at the top of the shoulder. Unlike converting to a Dasher where you have to heavily jam or do a "false shoulder" method, the BRA just takes a BR round of most anything.

I use just a few grains lower than normal with a cheap bullet, firearm while shooting club matches or steel matches.

Agreed, but some brass runs short. Combine that and a chamber cut with no crush and you might get into misfires when fire forming.

 

[bozo699]

fwiw, the .010 to just touching the lands reference I made was in regard to that bullet seeming to shoot well there and not for the purpose of holding the case against the bolt. I always setup any Ackley style case to have a slight amount of crush fit on the parent case and I don't like to rely on jamb for this. Some have good results but I have had misfires galore that way. So, if no crush in your chamber, I'd create a tiny false shoulder on the neck but that's just me. That way works best for me. With a BRA, you may well not need anything other than load and shoot. That was the intention, I believe. Not saying other ways won't work.

Spot on!… my preferred way with any of the 6 br variants and the Ackley
Wayne

 

[chop house]

So, if no crush in your chamber,

i have plenty. matter of fact i might have to bump the shoulders 0.001 or so. i can close the bolt, BUT by using more force than i like. definitely not the 'one finger' deal on some cases that is talked about.

it's a remage, so i could set it to whatever is needed i guess. matter of fact, i am contemplating changing 700 actions after a shilen trigger gets here today. so i might hold off due to heat and pending that decision.

but you all have armed me with the knowledge i need. thanks!

 

[chop house]

fwiw, the .010 to just touching the lands reference I made was in regard to that bullet seeming to shoot well there

thanks for the tip.

 

[gunsandgunsmithing]

thanks for the tip.

Just do what the gun likes but I would start at .010 in and come out .003 at a time if it were me. I bet it shoots great in that range.

 

[gunsandgunsmithing]

i have plenty. matter of fact i might have to bump the shoulders 0.001 or so. i can close the bolt, BUT by using more force than i like. definitely not the 'one finger' deal on some cases that is talked about.

it's a remage, so i could set it to whatever is needed i guess. matter of fact, i am contemplating changing 700 actions after a shilen trigger gets here today. so i might hold off due to heat and pending that decision.

but you all have armed me with the knowledge i need. thanks!

With this cartridge, the part that would need bumped for fire forming is that small area at the neck shoulder junction. I only mention that because most bushing dies don't touch that area. If it's not too tight, I'd just keep the lugs lubed well until you get them ff'd if it were me and if your die will still bump them enough after they get formed. Shouldn't be a problem though.

 

[chop house]

With this cartridge, the part that would need bumped for fire forming is that small area at the neck shoulder junction. I only mention that because most bushing dies don't touch that area. If it's not too tight, I'd just keep the lugs lubed well until you get them ff'd if it were me and if your die will still bump them enough after they get formed. Shouldn't be a problem though.

thanks mike. i had wondered about that. turns out i have a small excess of brass also, and may just cherry pick before loading to cull out the stubborn ones.

 

[Old Navy]

To get that bullet jammed will leave very little in the neck.