6 mm BRX

[akajiggs]

Hey guys, I am considering having a BRX chambered up for 300-600 yd matches. I know before we get started that the BR fits this bill very well as I have got and had several BR's. Never had one that didn't shoot very well.
Guess I am looking for a little more speed with the accuracy of the br. Don't say Dasher or BRA. Know that they are very good in the accuracy department but they seem like they are too finicky in my hands. It is probably the lack of knowledge ,on my part, that I just can't seem to get them tuned .
That being said , all the BRX threads are pretty old. Is anybody shooting one today that can share some real world experience ? Pros,Cons ? I want to hear it all because I want to make educated decision on one. Any help will be appreciated.
Thank you for your time and patience with me as I am an old fart and pretty thick headed.

Jim

 

[johara1]

First you have to fire form, and you had better know what bullet your going to shoot and where in relations to the lands it's going to shoot at because of the extremely short neck. A BR imp. is easier to fire form and you can buy brass already made from Alpha. I'm right now running it at 2966 with an ES. of 3 or less with H4895. 3000 is not hard to get with a fast barrel I have a Lederer with the same load run 2998 with sb.1 accuracy ......jim

 

[Gundog64]

Jim,
I have been using a BRX for the last few years for my 300-600 matches and love it. Easy on the shoulder and easy on the powder usage. I shoot all my fireform loads in matches and have always felt the accuracy was still good enough that if I lost a point it was probably my fault. I use the false shoulder method as I don't like jamming bullets in the lands then have a cease fire called and run the chance of dumping all that powder in the action.

 

[KenOath]

@comagutsa could probably be of some help he’s been shooting the BRX competitively for a couple years now...

 

[swd]

Love the BRX, probably my favorite cartridge. It's not finicky at all. Go 7" or 7.5" twist so you can shoot any bullet. .150" free bore is perfect for all the 105-110 bullets. I've gone to RL16 if you can find any.
Im sure @JEFFPPC will chime in, he's a big BRX fan too

 

[jr600yd]

I’ve been shooting the BRX for 20 years and love it for midrange F class matches. I use the false shoulder method and fireform brass at a match. You can’t go wrong fireforming using a 105-110 gr bullet over 30 grs of Varget. Another trick is the dies. If you don’t have a BRX sizing die you can do this. Run the fired brass into a 308, 243, 260, etc die minus the de-capping spindle. This will size the base of the brass. You can now use your 6BR dies adjusted for the BRX.

 

[Ranger188]

How about the BRDX?

 

[JEFFPPC]

The 6 BRX has been good to me for more years than I can remember. I shoot a pair, both started out as short range 6PPCs. As jr600yd mentioned I started out using a 6br die and then using a 243 die to size the base. After quite a few years I finally had Bob Green make me a pair of custom sizing dies. My first seating die was a Wilson micrometer seating die in .243 with enough taken of the bottom to accommodate the BRX. I have been through over 20 barrels all done with the same reamer by the same tool and die maker resulting in pretty much a universal load with minor seating depth tweaking that works. I have won both paper and steel matches from 100 to 1000 yards with them. For 110s you need a 7 twist and 105/107 bullets work well with 1 in 8. As Jim stated the short neck demands the correct throat length. Since I have a copy of Bob Chrones original reamer that was for 68 gr bullets I also have a throater. I seat a bullet so the pressure ring is half way down the neck and my Smith throats it to fit, just making a tiny mark on the bullet from the lands. Very easy as mentioned above to make brass. Lots of options, the current flavor of the month the 6 BRA as Jim mentioned above. That is a great endorse many from a shooter who has broken multiple 1000 records with a 6 Dasher....another version of the 6BRA. Lots of options, I am a believer in turned necks. They all work dependent on the time and effort put in by the shooter.I just got back from a match today were we finished off at 400 yds in a blinding snow storm. I found out you can't take a good barrel from one gun, screw it on a different rifle and get great results, you gotta do the final tweaking. I might get by with a tuner adjustment. If we ever get out of constant gale force winds I can get to the range and get tuned. Yes, I have 3 competition rifles, all have tuners. So james gregory, as a deceased friend use to tell me, pick what ever trips your trigger. They all work if you do the work, the 6 BRX tripped my trigger many years ago, and still does. Good luck.

 

[akajiggs]

Thanks men for all the information. It is very helpful.

Jim

 

[johara1]

As one old fart to an other, we don't have time to learn a chambering over again so my suggestion is for easy to make, easy on barrels and keep up with the conditions. BR variants shoot good with in the same useable velocity. The 6br is good but it is a little slower and harder to keep up to the conditions..... jim

 

[comagutsa]

hey mate
I've been shooting the 6BRX for a about 5yr now after a few with 6BRand 243, i have tried the 6BRA but went back to the 6BRX as it just works for me
i run a 270 neck so i have to turn my necks and run 001 neck tension with 003 clearance
i use Krieger HV 1:7.5 twist 236 bore 28 inch barrels 4 groove mainly but I'm trying a 5R from them atm with 150FB.
I've used 105gr hybrids, 108gr bergers and 107gr SMK with both varget (around 32.5gr at 3000fps)and H4350 (which I'm using for last 2 barrels at around 35.5gr at 2970fps to 3007fps depending on barrel but you will need a long drop tube to get it in when you get close to 35.8gr as you are close to a full case)
i have both done the Jam method to fire form 30gr of varget, 005 neck tension and jammed 030 and use soft primers and i also Hydro-form my brass, i now mainly hydro-form as i got a blown primer once from jammed method and it broke my Jewel trigger so i went back to hydro-forming and never had a problem since.
i used to use my 6BR dies to size then my 243 die to finish off the base of the case but now i use a Wilson FL bushing die and only just stopped using my Whidden FL bushing die.
i shoot benchrest 500m Fly here in Australia with the very odd F open when i get a chance
i love the caliber and to me its just so easy and i like trying stuff with it eg have a Eric Cortina tuner on atm and find it great but I'm still learning it, this barrel I'm trying not annealing my brass and I'm up to 10-11 reloads on my 100 cases and they are still great and have consistent seating pressure still and haven't lost any and its still doing 1@ to 2" groups at 500m/547y when i do my part

 

[JEFFPPC]

hey mate
I've been shooting the 6BRX for a about 5yr now after a few with 6BRand 243, i have tried the 6BRA but went back to the 6BRX as it just works for me
i run a 270 neck so i have to turn my necks and run 001 neck tension with 003 clearance
i use Krieger HV 1:7.5 twist 236 bore 28 inch barrels 4 groove mainly but I'm trying a 5R from them atm with 150FB.
I've used 105gr hybrids, 108gr bergers and 107gr SMK with both varget (around 32.5gr at 3000fps)and H4350 (which I'm using for last 2 barrels at around 35.5gr at 2970fps to 3007fps depending on barrel but you will need a long drop tube to get it in when you get close to 35.8gr as you are close to a full case)
i have both done the Jam method to fire form 30gr of varget, 005 neck tension and jammed 030 and use soft primers and i also Hydro-form my brass, i now mainly hydro-form as i got a blown primer once from jammed method and it broke my Jewel trigger so i went back to hydro-forming and never had a problem since.
i used to use my 6BR dies to size then my 243 die to finish off the base of the case but now i use a Wilson FL bushing die and only just stopped using my Whidden FL bushing die.
i shoot benchrest 500m Fly here in Australia with the very odd F open when i get a chance
i love the caliber and to me its just so easy and i like trying stuff with it eg have a Eric Cortina tuner on atm and find it great but I'm still learning it, this barrel I'm trying not annealing my brass and I'm up to 10-11 reloads on my 100 cases and they are still great and have consistent seating pressure still and haven't lost any and its still doing 1@ to 2" groups at 500m/547y when i do my part
View attachment 1253793

Not sure why you have a problem making cases. I have done about 1500 or so and never blew a primer. I use 29 gr Varget to fire form. I totally see no reason to hydraform. Just adds a step you don't need.I think your 30 gr of Varget might be a tad warm. Keep the chamber clean and dry. Run a patch down barrel every 5 rounds to keep throat clean. Wipe cases clean and dry them, brake kleen or alcohol. Do not let the barrel warm up or you will get different blow lengths. I cut my cases necks to .100 from the shoulder and jam a bullet. If your in a hurry you will not get the best results.

 

[brxbrad]

Been shooting one for 10 yrs now. As others have said, you cant go wrong with it. Use the false shoulder method and fire form at matches using 30 gns of varget .010 off the lands. I've always shot 1:8 twist, .010+/- off the lands, 105 gn Hybrid with .272 neck. Turn the neck enough to get rid of any oddities. I've used Bartlein, Kreiger, and Brux barrels with great results. Typical speed using 33.3 grains of Varget gives me 3020+/- fps. I was able to earn my High Master in Mid range and my Master in long range with it. As said above, base size with 243 base sizing die and use your BR dies adjusted longer for the .100 increase in shoulder height. Enjoy

 

[SET]

The best and only way I've fire formed new cases for the 6BRX is any 105 grain bullet jammed into the rifling ,010 to.020 " with a stout load of Varget.
Pretty much the same way I would fire form any cartridge.

 

[Louisb]

I am new to 6BRX and am really liking this cartridge so far. Was easy to fireform using false shoulder method using 30 grs of Varget and jamming bullet .008. I loaded for a match without further load development (no time to go to range etc) using 32.8 grs of Varget and jamming 105 VLD's .008 and it just shot so well. The information from this forum was incredibly helpful. Based on my experience (perhaps luck) this cartridge is very easy to load for. I have a 6X47 L that I am always trying to tune. I get my 6X47 L shooting good then back to tuning after every match. So far the 6BRX is working much better for me.

 

[comagutsa]

Not sure why you have a problem making cases. I have done about 1500 or so and never blew a primer. I use 29 gr Varget to fire form. I totally see no reason to hydraform. Just adds a step you don't need.I think your 30 gr of Varget might be a tad warm. Keep the chamber clean and dry. Run a patch down barrel every 5 rounds to keep throat clean. Wipe cases clean and dry them, brake kleen or alcohol. Do not let the barrel warm up or you will get different blow lengths. I cut my cases necks to .100 from the shoulder and jam a bullet. If your in a hurry you will not get the best results.

Hey mate
yeah i never had a problem for a hundreds of cases FF with 30gr then one day boom blown primer and one stuffed jewel trigger and it cost me $400 AUS to get a new trigger as i needed one asap and i had to get parts from the US.
i don't mind hydro forming at all and i can run my known load in a hydro formed case to finish it off and it doesn't affect accuracy at all, hell i even use the 1st firings to run a ladder while running in the barrel to get me an idea what powder and projectile it likes, so I'm not wasting any barrel life and it gives me a good idea where to start my testing