primers

[ewmn]

What are some good primer choices ? I will be using 1fired lc nato brass, hornady 168 gr. HPBT and imr 8208 xbr. These rounds are for my M&P 10.

 

[copemech]

What are some good primer choices ? I will be using 1fired lc nato brass, hornady 168 gr. HPBT and imr 8208 xbr. These rounds are for my M&P 10.

I have only used CCI or Winchester, no issues there. Add the fact that is what my Lee primer feeder says to use.

Try some 168 Amax bullets as well.

 

[Bat Guano]

I've used W-W and/or CCI std. LR primers in ball equiv/match loads for years in '06 and 7.62 (M1, M14, and M1A) with no problems at all. Had some mil-spec primers but never used them and traded them off.

Now breaking in an M&P 10 and commercial primers in the 7.62 run fine. Got nothing against mil-spec but don't see a real need and commercial ones are easier to come by.

 

[okstatefan]

CCI here. I've used other primers (Winchester, S&B) in pistols.

 

[MichiganScott]

Usually mil-spec primers are recommended in AR style rifles. They are not necessary in a M&P10 because S&W included a firing pin return spring the stops the pin from protruding from the bolt during feeding.

8208XBR should ignite just fine with any large rifle primer you might have on ahnd.

 

[Bassaro]

I've always been a big fan of Remington 9 1/2 LR primers for all things large rifle. Seem to get "the" load using them more often than with CCI, Federal or Winchester could just be luck though

 

[bergermeister]

Study on 'slam-fires' in AR rifles

Good information on primers for AR usage Slam Fires and the AR Platform

This paper was apparently done for the AR-15. As Michigan Scott pointed out, the MP-10 has a firing pin spring installed into it which should mitigate any thin primers causing a problem. I found Mr Frog's information noteworthy, especially to anyone who also loads for the AR-15's.

 

[bergermeister]

Good point

Usually mil-spec primers are recommended in AR style rifles. They are not necessary in a M&P10 because S&W included a firing pin return spring the stops the pin from protruding from the bolt during feeding.

Unquestionably one of the finer points of the MP-10. (A 15-cent spring)

 

[webfarmer]

WLR primers in my 7.62 loads. Zero primer problems thus far. This thread might get more visibility in the reloading forum? Good luck!