Question About 9mm Magnum Primers.

[snakeman56]

I am new to reloading and would like to know if I can use Magnum Primers for 9mm Luger?
Also if I can what is the recipe or your suggestions Pros or Cons.

Thank you
Tom

[Chief-7700]

Why?

[lpspinner]

I'm guessing, that you ended up with magnum primers? If that's the case, I would try and trade them off.

Personally, I wouldn't use them for 9mm cause it has a stronger ignition then standard primers. What that equates to is a faster burn of the power inside the case. A faster burn would most likely cause the pressure to build up faster. Something your loads may not be designed for.

[Bill Steele]

I'm guessing, that you ended up with magnum primers? If that's the case, I would try and trade them off.

Personally, I wouldn't use them for 9mm cause it has a stronger ignition then standard primers. What that equates to is a faster burn of the power inside the case. A faster burn would most likely cause the pressure to build up faster. Something your loads may not be designed for.

I agree with this observation. If you are new to reloading I would recommend either trading them for the proper primer or just stick them away for the time when you have a use for them.

Having said that, I have loaded magnum primers with just about every caliber I load. I always start below book start levels and work up slowly. In general, the biggest impact magnum primers seem to have are with the smaller cases and higher pressure calibers (9mm qualifies).

Anytime I am loading light and am looking for the highest consistency in velocity I use magnum primers, but again, this is a game for experienced loaders and best approached very cautiously. Not for newbies.

Have fun, good luck.

[wtkaiser]

Magnum primers burn hotter and for a longer period of time (although it's all over in tiny fractions of a second). You simply do not need that sort of ignition in a case the size of the 9mm. And it does raise pressures, as mentioned. So as a beginning reloader, do yourself a big favor and either trade them off or stick them in the back of the shelf in your "cool dry place" until you get a .357, where you can use them with certain powders. They will stay good for years if stored correctly.

[snakeman56]

Thank you all for your suggestions!!

[ireload]

I'll be the odd ball here. Yes you can use a mag primer for a 9mm but and I do stress but you have to reduce your powder charge to a minimum. Now since you are a new reloader I would stick with standard primers till you gain more experience down the road. My recipe may not jive with the particular gun you have since it's tailored to mine. Sorry no recipe from me.

[HighLander51]

Been running CCI magnum primers in competition for years. 125 TC bear creek moly on top of 4.0 grs TiteGroup OAL at 1.155", goes about 1,200 fps.