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Old 11-16-2013, 15:53   #1
FiremanMike
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Winchester WMA brass?

I have some winchester WMA 13 9mm brass that I picked up today at the range.

1. Does anyone know anything, good or bad, about this brass?

2. There does appear to be a crimp around the primer, but I checked the inside diameter with my calipers and it was identical to a random case that didn't have the crimp ring. Will I have any issues seating primers?

Thanks.
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Old 11-18-2013, 19:55   #2
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No one has seen/loaded this brass?
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Old 11-18-2013, 21:49   #3
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It is suppose to be from the newer Winchester plant. The older plant uses headstamp, "WCC" and the newer location uses, "WMA" for military ammunition that requires different headstamp markings for different plant locations.
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Old 11-19-2013, 01:42   #4
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Quote:
Originally Posted by FiremanMike View Post
I have some winchester WMA 13 9mm brass that I picked up today at the range.

1. Does anyone know anything, good or bad, about this brass?

2. There does appear to be a crimp around the primer, but I checked the inside diameter with my calipers and it was identical to a random case that didn't have the crimp ring. Will I have any issues seating primers?

Thanks.
The two inside diameters might be similar but the actual edge where your primer enters the primer pocket would be a critical issue.
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Old 11-19-2013, 07:41   #5
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Quote:
Originally Posted by FiremanMike View Post
I have some winchester WMA 13 9mm brass that I picked up today at the range.

1. Does anyone know anything, good or bad, about this brass?

2. There does appear to be a crimp around the primer, but I checked the inside diameter with my calipers and it was identical to a random case that didn't have the crimp ring. Will I have any issues seating primers?

Thanks.

I don't know anything about the brass but if it is military as posited above, yes, the primer will probably be crimped and, yes, you will have problems when seating primers.

Why not just try a few? Either the new primers seat properly or they don't. You'll know in a couple of minutes. BTW, I have never been happy trying to jam a primer into a crimped pocket. It seems to me there is a real good chance of a detonation.

RCBS makes a primer pocket swaging die set for single stage presses. A lot of people make reamers to use in a drill motor. Dillon & RCBS make bench swagers. The Dillon 1050 has a primer swaging station built in.

If the pockets are crimped, you will have to decide whether to a) dispose of the brass, b) save it for another day or c) deal with it.

Richard
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Old 11-19-2013, 18:11   #6
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Yeah, I'll try one and see, but you're probably right..

They were WWB, I can't understand why winchester started doing that.. what a pain.

Thanks guys.
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Old 11-20-2013, 13:43   #7
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Quote:
Originally Posted by F106 Fan View Post
Why not just try a few? Either the new primers seat properly or they don't. You'll know in a couple of minutes. BTW, I have never been happy trying to jam a primer into a crimped pocket. It seems to me there is a real good chance of a detonation.
I've literally crushed a few primers that got in off-kilter and they've not gone off. As long as you're not hitting them pretty hard (SMACK!) they'll take a lot of abuse.

That said, your advice is wise.
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Old 11-20-2013, 14:12   #8
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I've literally crushed a few primers that got in off-kilter and they've not gone off. As long as you're not hitting them pretty hard (SMACK!) they'll take a lot of abuse.

That said, your advice is wise.
And I have blown up 2 trying to seat a LPP in a SPP case. Not a big deal but it does add a little excitement to the process.

I want a radius on the primer pocket. Even if the primer would fit by dimension, a little lead-in makes seating go a lot better.

Richard
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Old 11-20-2013, 14:17   #9
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And I have blown up 2 trying to seat a LPP in a SPP case. Not a big deal but it does add a little excitement to the process.
Wow. Were you going fast or did you set them off with just pressure? I've never popped one (yet).

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I want a radius on the primer pocket. Even if the primer would fit by dimension, a little lead-in makes seating go a lot better.
I agree with that.
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