Win 9mm Brass Crimped Primers?

[Kp321]

I picked up a batch of once fired 9mm brass last week and started loading it today. It is range brass, mixed head stamps. I noticed that some of the commercial Winchester brass has crimped primers while some of the Winchester GI brass, WCC 03 (NATO cross) does not. I was really surprised to find the crimps on the commercial brass. Has anyone else observed this?

 

[Toprudder]

If it was "WIN NT" then, yes, they are all crimped. Those are the ones with Non-Toxic primers. I know I have seen those in 40 and 45acp (small primers, too). If the NATO rounds were not crimped, then someone had previously reloaded those and either reamed or swaged the crimps away.

 

[sparkyv]

If the NATO rounds were not crimped, then someone had previously reloaded those and either reamed or swaged the crimps away.

^^^This^^^

I put 9mm cases with crimped primers in my "to trade" pile. Too much trouble for me to dress primer pockets for such readily available, and thus inexpensive (dare I say "free") pistol brass.

 

[Toprudder]

^^^This^^^

I put 9mm cases with crimped primers in my "to trade" pile. Too much trouble for me to dress primer pockets for such readily available, and thus inexpensive (dare I say "free") pistol brass.

But it is so hard for me to throw away brass!!!

I used to take the time to process NATO 9mm brass, but I am doing like you now. Too much free AND EASY 9mm brass out there to justify it.

 

[Walkalong]

Yep, I don't even pick it up anymore. If I find one sorting etc it goes in the scrap bucket these days.

 

[Dudedog]

Yep crimped 9mm. I don't bother with it, goes into the recycle can.
Crimps are not that hard to remove but I have a enough 9mm brass it's not worth messing with for me.
(The ones with the step in the case go in the recycle can also)

But it is so hard for me to throw away brass!!!

I know, while I will remove the crimps from .223/5.56 I draw the line on removing them from pistol brass.

 

[jmorris]

That’s the best thing about the 1050, you never have worry about crimped cases as every case is swaged as part of the normal loading process, adding no extra work of time spent on my part.

 

[Kp321]

Ok, now my question is why are the nt primers crimped? Are they hotter?

 

[cheygriz]

I have a Dillon "Super Swage."

I would never throw away good top quality MilSurp brass because of a crimped pocket.

 

[Toprudder]

Ok, now my question is why are the nt primers crimped? Are they hotter?

Yes, from what I have heard. That is also why the "NT" stamped 45acp is all small primer.

 

[mdi]

For me removing military primer crimps is no big deal, I use a countersink or reloading chamfer tool. I have way more time to reload than to shoot and I'm not in any hurry, so removing crimps keeps me in touch with my reloading (and out of my wife's way)...

IIRC and I may be wrong, but didn't NT brass have larger flash holes? Crimp may prevent primers from "blowing out"...

 

[Toprudder]

IIRC and I may be wrong, but didn't NT brass have larger flash holes? Crimp may prevent primers from "blowing out"...

I have read that the early NT brass had large flash holes. I have not seen that to be the case in any of the NT brass I personally have encountered.

 

[Bartojc]

I see NATO stamped brass with crimps every so often. I used to save them for an emergency stash. Now that I have a small plastic pail full I do not have the ambition to remove the crimp. I keep them as trade bait or to help someone who may need them more than me and have more initiative.

-Jeff

 

[Dudedog]

Crimped for submachine guns I would imagine.

 

[mdi]

If anyone has crimped NATO brass they are too busy to decrimp, PM me and for any quantity, I'll pay shipping...

7.62x51 and 45 ACP as I've got a lot of 9mm (2,000?).

 

[hdwhit]

kp321 asked:
Ok, now my question is why are the nt primers crimped? Are they hotter?

Not necessarily. Depending on the particular explosive being used, the explosive wavefront that moves through the flash hole may be decidedly "cooler" than what is produced by lead styphnate. But, the explosive used in the non-toxic primers may build have a higher velocity or the explosive wavefront may have a peak pressure that has a longer duration thus making it more likely the primer will be pushed out of the pocket.

 

[Blue68f100]

When the NT's first came out the primers where backing out with the std flash hole and no crimp. They then enlarged the flash hole and started crimping. This was early on. I have not heard of any info since. So I don't know if this became std or did they change the primer pillow to a smaller size to prevent these from backing out so it was not going to be a major problem for hand loaders and brass mfg to retool. Most if the NT I have seen has a larger flash hole.