6.5 CM can you use small rifle magnum primers?

[Cubbear]

Recently I purchased a lot of small primer in the 6.5 CM lapua brass. I was also doing some research on the hammer hunting bullets. I read the small primer gives a better SD and if read correctly a magnum primer is approved for better ignition. My question is to separate fact from fiction from the experts here. My rifle is a stock Tikka 24 inch barrel with 1-8 twist. Can you use a small magnum rifle primer with the powders listed in reloading manuals and if so are there any problems I could face with the twist rate I have.
I currently want to load the hornady 95 gr v max and 123 gr sst bullets I have. I also am wanting to purchase some hammer bullets or Barnes for to load for my hunting rounds. Thanks in advance.

 

[Eric H]

Absolutely!!!. That's what I use in my SP Lapua brass.

 

[Cubbear]

thanks. I was worried there would be a significant pressure increase

 

[milboltnut]

thanks. I was worried there would be a significant pressure increase

depending on the powder used....slower burning no so much but faster, yeah it might. You probably don't need it. CM case is relatively small. Remington 7.5 small rifle are pretty hot.

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[Pdyson]

Absolutely, some slower powders have a tendency to delay upon ignition. Hotter mag primers are the cure. BTW some std primers actually burn hotter than the magnums. I wouldn't just swap in magnum primers on an existing load. Especially if I were near maximum. Best to back off and work back up, just to be safe.

 

[milboltnut]

Absolutely, some slower powders have a tendency to delay upon ignition. Hotter mag primers are the cure. BTW some std primers actually burn hotter than the magnums. I wouldn't just swap in magnum primers on an existing load. Especially if I were near maximum. Best to back off and work back up, just to be safe.

some do, and yes !

 

[Cubbear]

I have some h4350 imr 4350 Varget and superformance powder. All are listed as a medium to medium slow powder

 

[milboltnut]

Varget for the 123 grainers, 4350 for the heavier bullets.

 

[Dmagna]

I use CCI 450's with 48 grains of rl26 for my creed. 28" barrel reaches 2950. Then another one with h4350

 

[QuietTexan]

I use magnum primers with ball powders, specifically the Superperformance you mentioned. SP is slower and I use it with heavier bullets in the 6.5CM, for the lighter ones you have/want to shoot IMO Varget and H4350 are better.

I was one-holing 143 ELD-Xs with SP, but as you go to a lighter bullet it'll slow down and eventually you'll run out of powder room while still 100+fps behind a faster powder.

 

[Cubbear]

Thanks everyone I will be doing my load tests on the powders you recommended for different Bullet weights and comparison. I'll start in the 2800 fps and work up.

 

[Pdyson]

Great, send us a range report

 

[CoachChris]

I load IMR4166 in Palma brass with CCI #450's with 168gr, 175gr and 178gr bullets with no pressure issues.

 

[30BR]

FWIW: 6mmBR and variants nearly always use CCI 450 primers (small rifle magnum) in competition.