6BR primers

[kelbro]

I haven't been loading 6BR for a few years and plan to start shooting it again. In the past, magnum primers were the go-to and CCI450s seemed to be the overall favorite.

Is that still the case? I have a large selection of primers and the 450s are not in the highest quantity on my shelf.

I have a LOT of GM205M that I would like to try and a LOT of Winchester small rifle primers. Quite a bit of Rem 7.5s also.

What's the current consensus on primers for 6BR?

Thanks

 

[MDT6BRA]

I use the br4 and some gold metal match small

 

[Rat Rifle]

I use the br4 and some gold metal match small

I normally use cci450’s, but I just jumped on 5,000 br4’s at a price that I couldn’t pass up. So I hope they perform just as well.

 

[HTSmith]

I think you could tune your load to any of your primers. For me the CCI450 and Rem7.5 work the same. I'm certainly no expert.

 

[Walt Schmidlin]

7.5 work well in my BRX with both N-140 or H-4895

 

[Bill Norris]

My go to primer for the 6BR has always been the BR-4 but when I moved up to the 6BRX I went to the 450.

 

[Murray Brook]

What I have noticed over my years of reloading is that ( regardless of cartridge) certain primers seem to work better with certain powders. For example most times I got great accuracy with the N powders in my PPC's and BR'S the Fed 205 was the primer. I also noticed most times using H powders and getting great accuracy that the CCI450 was the primer of choice. Certainly not etched in stone but a lot of the time it was this way for me. JME

 

[Ackman]

Easy enough to compare them...... just load up a couple sets with whatever 2 you're curious about. I've compared 7-1/2 to the BR4. Sometimes with a powder, they'll both be the same, other times one is slightly better.

 

[30EX]

I load at the range when I am testing, just load 10 cases with what you like and pick 2 primers, use the same 10 cases, load the same but with the different primer and compare, clean barrel first, I can tell the difference on the second group if any

 

[JLT]

The BR-cased cartridges don't need much of a spark to deliver good, consistent ignition of the powder charge.

Russian primers (Tula, Wolf, Murom - they're all made in the same factory) are very mild and they have produced the best results in my Dasher, although I've never tried the 205/205Ms. What's interesting is the Remington 7 1/2s aren't far behind in terms of on-target performance with most powders, and they are pretty frisky small rifle primers based on chronograph data. The 450s are solid performers in my experience, but the charge needs to be adjusted from the Tula/Murom base, along with the 7 1/2s, for best results.

If there's a bottom line here, I suspect just about any small rifle primer can give you acceptable results with proper work-up.

 

[alintx]

The BR-cased cartridges don't need much of a spark to deliver good, consistent ignition of the powder charge.

Russian primers (Tula, Wolf, Murom - they're all made in the same factory) are very mild and they have produced the best results in my Dasher, although I've never tried the 205/205Ms. What's interesting is the Remington 7 1/2s aren't far behind in terms of on-target performance with most powders, and they are pretty frisky small rifle primers based on chronograph data. The 450s are solid performers in my experience, but the charge needs to be adjusted from the Tula/Murom base, along with the 7 1/2s, for best results.

If there's a bottom line here, I suspect just about any small rifle primer can give you acceptable results with proper work-up.

I can't across a smoking deal on muron sr mag primers. Had never heard of em, and figured at the worst I could burn em up in my ar15s. Tried done in my Dasher and br's, and now I'm burning up my federal and cci in my ar's

 

[JB10]

I have always just used 205s

 

[6MMsteve]

I can't across a smoking deal on muron sr mag primers. Had never heard of em, and figured at the worst I could burn em up in my ar15s. Tried done in my Dasher and br's, and now I'm burning up my federal and cci in my ar's

The Murom SRM primers work great in my 260's and 6xc's they look nice and perform well, I got mine at American reloading got a good deal

 

[NZ_Fclass]

Have been using Ginex with good results - but for matches, Remington 7 1/2 or RWS do fine. CCI 450's in the Dasher and BRX.

 

[Brew2]

In my 6BR I use CCI 450's. I have of course tested others. In my rifle I seemed to get a much more stable ignition for my charge. My E/S seemed to settle down for me.

 

[Ccrider]

Powder charge, seating depth, neck tension. Once I get them right the rifle is in tune and there is no need to turn the tuner because the rifle is shooting as small as possible. If it’s not, it’s not tuned.

After I have it tuned, if it begins to open up, I turn the tuner or adjust the powder charge depending on what I see and what gun I am shooting.

 

[CaptainMal]

Just yesterday I tested one of my 6 BRA tournament rifles with both BR4 and 450 CCI primers. Same bullet and load ( 108 Bergers and 31.5 gr of Precision). The 450's had a slightly larger ES around 2890 fps.

Now the BR4's upped the velocity to 2905 fps with a smaller ES. Interesting but during my 200 yard test the 450's averaged .3" groups and the BR4's did .5". Both had the same impact point using the same tuner setting.

 

[Dgd6mm]

450 CCI's. But my rifle is a steel plinker/pdog rifle.

 

[dusterdave173]

450 CCI's. But my rifle is a steel plinker/pdog rifle.

Me too
450's just flat out Work

 

[Rat Rifle]

Me too
450's just flat out Work

Are 450’s “always” better than BR4’s ?
Asking for a friend