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Magnum pistol for rifles?


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Has anyone use Magnum small pistol primers for 300 blackout? I had two guys that reload tell me that they would work, however one mentioned that out of an AR it could cause a slam fire.

I personaly DO NOT do anything that my reloading charts don't tell me to do! Primers or otherwise. Someone else may have used them though.

 

Dave

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In spite of your recommendations, I think I'm going to try about 10 and see what happens.  I loaded one of the primers into a piece of brass without buller/powder and fed it into my AR to see if it would set off the primer.  When I extracted the brass there wasn't even a mark on it.  So i loaded it back in and slammed the bolt home again and there was nothing.  The photos below are are the indentation the firing pin made after I repeated slamming the bolt home about 12-15 times. As you can see its pretty faint. One picture is clearer than the other, but the fuzzy one represents the actually mark the firing pin made better.   I've had other rounds dent the primer much deeper than that on other ARs before. I guess it could be a combination of barrel extension, bolt, and firing pin.  Since its only going in this one gun thats, all im concerned with.  I also read that small pistol primers arent as long as small rifle primers so they seat a bit better.    




 

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You're playing a fools game. The metal is thinner onpistol primers. You will eventually get a pierced primer. You won't like it when it happens. Promise.


THIS!

Pressures are higher in a rifle and pistol primers are thinner metal.

Do you have any idea what happens if the round goes off before the bolt rotates closed?
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