Magnum primers
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sansone
Member
sure, use them. As with any new loads be sure to work-up slowly and check for signs of over-pressure. Some people say the magnum primers make the powder burn faster but I have not seen much difference
rfwobbly
Member
Premier -
CCI 350 are Magnum primers and are OK to use, but you should work up your load again. You will tend to get higher pressures and if your pet load is already near max, then problems could arise.
If you just want to sit down and load 600 rounds today for a competition tomorrow and/or don't have the time or inclination to work up the load again, then the best thing is to simply return them. The basis for this statement is to always err toward safety.
All the best.
CCI 350 are Magnum primers and are OK to use, but you should work up your load again. You will tend to get higher pressures and if your pet load is already near max, then problems could arise.
If you just want to sit down and load 600 rounds today for a competition tomorrow and/or don't have the time or inclination to work up the load again, then the best thing is to simply return them. The basis for this statement is to always err toward safety.
All the best.
sansone
Member
wobbly is correct about a "pet-Load".. if you are very fond of a specific load and don't want any changes, you may be dissapointed.
Just take them back and exchange them if they have the standard primers. If they don't, back off a tenth or two on your charge (depending on burn speed) and it will most likely shoot very well. Plenty of folks used mag primers during the crunch when they could get nothing else. We have all done something similar along the way. I bought a .38 S&W thinking it was a .38 Spl many years ago. Turned out OK though. Fun caliber. 
788Ham
Member
Walkalong stole my thunder, I was going to tell you to back off 1/10th of a grain when using mag primers, rather than regular primers.
kimbernut
Member
Maybe...
"if you are very fond of a specific load and don't want any changes, you may be dissapointed."
And then again it may be even better than your best- won't know 'til you try.
So far I have found no difference in the handgun loads I've tried both on.
"if you are very fond of a specific load and don't want any changes, you may be dissapointed."
And then again it may be even better than your best- won't know 'til you try.
So far I have found no difference in the handgun loads I've tried both on.
Can't speak for .45 but I have loaded 9mm with Magnum primers. Range loads so they were "mid-range". I don't see loading max loads to wear out my pistol just shooting targets.
I saw a good study done by one shooter who did a series of tests using different primers in the same firearm. He put a lot of work into it and had some nice charts and graphs. In the end there was more variations within a given load with same components that there was between "standard" and "magnum" primers.
As has been mentioned the only problem is when you get a really maxed out load as the magnum primers may cause a bit more pressure surge when the powder first lights off. They can change the pressure curve, as in raising max pressure, as you start accelerating the projectile. So, it gets complex as it relates to powder burn rates, how quickly the powder lights off, the weight of the projectile, etc.
Oh...you got my head spinning here....all I know is I have used Magnum primers, in a pinch, and had no issues. But....midrange loads, nothing "hot".
I saw a good study done by one shooter who did a series of tests using different primers in the same firearm. He put a lot of work into it and had some nice charts and graphs. In the end there was more variations within a given load with same components that there was between "standard" and "magnum" primers.
As has been mentioned the only problem is when you get a really maxed out load as the magnum primers may cause a bit more pressure surge when the powder first lights off. They can change the pressure curve, as in raising max pressure, as you start accelerating the projectile. So, it gets complex as it relates to powder burn rates, how quickly the powder lights off, the weight of the projectile, etc.
Oh...you got my head spinning here....all I know is I have used Magnum primers, in a pinch, and had no issues. But....midrange loads, nothing "hot".
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