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Old December 28, 2005, 08:06 AM   #1
Join Date: November 16, 2001
Location: PA
Posts: 27
confusion with remington primers?

I just found out that I've been using the wrong remington primer for 1000s of rounds. I've been loading rem 5 1/2 primer for 9mm ammo. On the box it simply says small pistol primers, but now I read on the remington website that they are the magnum primers and 1 1/2 are for typical small pistol cartridges like the 9mm? Not labeled very well on the box! Was I on the verge of blowing myself up? Any comments?
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Old December 28, 2005, 11:18 AM   #2
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Here is a primer table from Real Guns.

I think you want the 1 1/2

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Old December 28, 2005, 12:25 PM   #3
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I don't know if you were on the verge or not, you didn't specify the load. If is was a lighter load, probably not. Don't use magnum primers unless the data calls for it.
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Old December 28, 2005, 01:59 PM   #4
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My guess, based in tens of thousands of rounds, is that going to a magnum primer raises pressures no more than 10% and generally less.
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Old December 29, 2005, 01:16 PM   #5
Join Date: November 16, 2001
Location: PA
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Yes, I now know that I should use rem 1 1/2 primers. I was using very middle of the road loads anyway and saw no pressure signs. I loaded some with 1 1/2 and chronographed them and they were very close to the incorrect load where I used magnum primers. I'm glad I didn't blow up. Now I know better!
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Old December 29, 2005, 01:31 PM   #6
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That primer chart is gonna result in somebody using the rem 6 1/2 for 223! Yes, it's a small rifle primer, what they don't say there is it was meant for the 22 Hornet, bee or other small low pressure 22 centerfire. Use that 6.5 in a .223 and you'll get perforated primers with damage to your bolt face! Another example of rem not being very clear on primer numbers. USE THE 7 1/2 FOR .223!
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