Lr primers and lower SD's

[s-xander]

How much difference is there in using cci 250 primers vs. cci br2 primers and will the br2 aid in a lower SD?

 

[Jerry m]

What, cartridge, powder, temperature, rifle... All will pay a part in the answer.

I shot a 7mm RM with AA3100 with BR2s with good results out to 1,200 yards. I got hang fires with a 6.5 RM using R19 while trying BR2s and Standard 200s. This occurred even though I was over 10 grains more powder in the 7mm RM than the 6.5 RM.

Good Luck

Jerry

 

[s-xander]

What, cartridge, powder, temperature, rifle... All will pay a part in the answer.

I shot a 7mm RM with AA3100 with BR2s with good results out to 1,200 yards. I got hang fires with a 6.5 RM using R19 while trying BR2s and Standard 200s. This occurred even though I was over 10 grains more powder in the 7mm RM than the 6.5 RM.

Good Luck

Jerry

What, cartridge, powder, temperature, rifle... All will pay a part in the answer.

I shot a 7mm RM with AA3100 with BR2s with good results out to 1,200 yards. I got hang fires with a 6.5 RM using R19 while trying BR2s and Standard 200s. This occurred even though I was over 10 grains more powder in the 7mm RM than the 6.5 RM.

Good Luck

Jerry

6.5 CM
140 gr. Eld
42.72 gr. Of R16
10 thousands off the lands

 

[cooper_257]

The BR2s should work great for the 6.5 CM. You usually don't need a magnum primer until you are at 70 grains or better of slow burning powder like H1000 or Retumbo.

 

[cooper_257]

In my 6.5 SAUM I have always been able to get better SD's with LR primers than Magnum and that's with 60gr of H1000

 

[Rocketmandb]

The BR2s should work great for the 6.5 CM. You usually don't need a magnum primer until you are at 70 grains or better of slow burning powder like H1000 or Retumbo.

I'm using them in my 300 PRC with mid-70 gr of RL-26. That being said, I pretty much don't shoot in temps lower than about 50 F.

 

[axarob44]

In my 6.5 SAUM I have always been able to get better SD's with LR primers than Magnum and that's with 60gr of H1000

Yep, same here for my 7 SAUM ended up doing better with BR2's over the FED215M primer with SD/ES numbers using RL26.

i did get hang fires with BR2's in .300WM and 73 grains of RL22 that went away with 215M's

 

[Steel head]

In my 6.5 SAUM I have always been able to get better SD's with LR primers than Magnum and that's with 60gr of H1000

Same in my 7SAUM with H1000 and R26.

 

[Mxracer532]

Not apples to apples but I just tested this today with my .243. load is 42g H4350, Lapua brass (brand new unfired) and ,95g VLD'S and I tried BR2's with an SD of 16.1 then shot the same load with cci 200's and had an SD of 9.5.
Next time out I will try Fed GM 210's.

 

[DamagedGuds]

I shoot a 6.5 CM. I consistently get 7-8 SD using the BR2's with IMR4350

 

[ThreeBravo]

Using starline brass and 38.2gr of varget pushing a 130 nosler rdf im consistently getting single digit SDs using BR2 primers.