Rem 1-1/2 Primer warning for .40S&W, why?

[Deavis]

I bought a batch of Remington 1-1/2 primers and while putting them away noticed there is a warning about using them in .40S&W rounds. I searched the Net and this forum trying to find out what the issue is, but can't find anything. Anyone every heard of this or had a problem with using them in .40 S&W, 357SIG, or 357 magnum? They specifically warn against those three. Seems odd since they recommend their magnum primer, the 5-1/2, instead for those loads, whereas everyone else recommends the regular small pistol for everything but the 357 magnum.

I've got a few thousand and was hoping to use them but not if they are going to be dangerous for some reason. Anybody have any ideas or experience with this issue?

 

[redneck2]

Pure guess...

high pressure rounds sometimes require a mag primer (ala 454 Casull which goes clear up to a small rifle mag primer). I'd suspect the cup is stronger to survive the pressure spike.

Read somewhere about the variation in metal strength between brands. Don't remember where.

 

[Khornet]

I guess I'm posting this from the next world

after blowing up. I'm on my second thousand of Rem 1 1/2 primers used in my exploding Glock 22 with 165 gr bullets and Unique. Just tried out a new load, Accurate No.5 7.3 gr with same bullet and primer....very accurate, no pressure signs (for what that's worth).

 

[Deavis]

Remington's response

here is Remington's answer to my question concerning the use of 1-1/2 primers in 357 SIG and .40 S&W

Subject
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1-1/2 primer question


Discussion Thread
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Response (Derek) - 02/23/2004 11:37 AM
Dear Anthony,
Thank you for your inquiry. The 40S&W and the 357 Sig both use the
5-1/2 small pistol primers because the primer pocket on those cases are
designed to hold that primer size. The 1-1/2 primer has a thin primer
cup that may puncture under the high pressures generated by the calibers
that you have specified.

So, it is a cup strength issue.

 

[Khornet]

Interesting

Wonder if it's more a CYA thing than anything else. I've not seen any unusual features on my fired 1 1/2 primers, and I check them closely with each new load. Guess I'll just use 'em up and go on with 5 1/2.