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Primer Pockets

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varmintcaller View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote varmintcaller Quote  Post ReplyReply Direct Link To This Post Topic: Primer Pockets
    Posted: 02 March 2012 at 08:06

I was repriming some 257 Weatherby brass and on some of the cases the primer pockets had enlarged to the point that no resistance was felt when seating the primer. the primers just fell into the pocket.

this brass was from factory loaded ammo, and it was the first time it was resized. I have heard of a company that makes a tool that shrinks (swages) the primer pockets back to the right size, but I cant remember where I heard it from.

does anyone know of this company, and how I can contact them? I have about 200 pieces of 257 brass and I want to make sure the primer pockets are going to be ok prior to reloading them

thanks for any information.

Molon Labe "Come take Them"






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Irish Bird Dog View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Irish Bird Dog Quote  Post ReplyReply Direct Link To This Post Posted: 02 March 2012 at 16:40
try http://www.brownells.com/

or http://www.midwayusa.com/

there is a swage to reduce shotshell primer pockets but don't know of any for brass rifle cases


Edited by Irish Bird Dog
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deaddog View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote deaddog Quote  Post ReplyReply Direct Link To This Post Posted: 03 March 2012 at 02:36
Case saver primer pocket swage

www.mountsplus.com

$45





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Post Options Post Options   Thanks (0) Thanks(0)   Quote CB900F Quote  Post ReplyReply Direct Link To This Post Posted: 03 March 2012 at 03:38

Varmint;

Just my opinion, but I wouldn't bother.  I doubt that any tool is going to be able to effectively address the stress issues imparted to the brass by a load that opened 'em up in the first place.  T'were me, I'd just bite the bullet & buy fresh brass.

900F

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Post Options Post Options   Thanks (0) Thanks(0)   Quote varmintcaller Quote  Post ReplyReply Direct Link To This Post Posted: 03 March 2012 at 06:53

deaddog

Thanks for the info, Ill look into that tool

Irish Bird Dog

Thanks

CB

 I think you are right, if there was enough pressure to enlarge the primer pockets that much, the  heads must be pretty weak. Ill just toss them. Norma must load their WBY factory ammo really hot.

Molon Labe "Come take Them"






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Post Options Post Options   Thanks (0) Thanks(0)   Quote deaddog Quote  Post ReplyReply Direct Link To This Post Posted: 03 March 2012 at 09:53
Just for discussion's sake. If you can re-size a case mouth why not a
pocket? If the brass is malleable and not old and brittle what's a little
squeeze going to do? I understand if it's getting thin around the head
from stretching but this is a little different. Myself I find CCI's a little
thicker than the Winchester's I usually use. And I can normally get
another load or two before i pitch em. My problem brass for pockets
are .270's. With the cost and rarity of .257 WBY's I know I'd be looking
for a solution.
Norma has always had the softest brass. It flows more but splits less.
DD

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Post Options Post Options   Thanks (0) Thanks(0)   Quote RobertMT Quote  Post ReplyReply Direct Link To This Post Posted: 03 March 2012 at 17:04

I've run into same issues with norma brass, in my 257wby.  I've started using reforming WW 7mag brass.  You end up with a neck that's on short side and you have to back off a hair, due to capacity difference, but they hold primers better at higher pressure.  I also use CCI 250s in mine, WLRM are too small, even on first loading.  With Norma brass, I can get maybe three hot loads out of it, with WW brass, I get six to seven and why have 257wby, if you don't load hot.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote varmintcaller Quote  Post ReplyReply Direct Link To This Post Posted: 07 March 2012 at 12:10

RobertMT

When you reform Winchester brass, do you just run it through a 257 Wby die? I could save a lot of $$$ by reforming 257&270 Wby. How do you handle the round shoulder on the Wby cases?



Edited by varmintcaller
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Irish Bird Dog Quote  Post ReplyReply Direct Link To This Post Posted: 07 March 2012 at 13:37
Originally posted by varmintcaller varmintcaller wrote:

RobertMT

When you reform Winchester brass, do you just run it through a 257 Wby die? I could save a lot of $$$ by reforming 257&270 Wby. How do you handle the round shoulder on the Wby cases?




fireform???????
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RobertMT Quote  Post ReplyReply Direct Link To This Post Posted: 07 March 2012 at 23:11

I lube case well, especially inside neck and run it in 257wby die, you end up with 95% of  radis formed, rest will blow out first firing.  I end up with case length of 2.490" intead of 2.540" trim to length of norma 257wby case, your necks end up .050" short, which is to be expected 7mag case starts .049" shorter.  Neck is long enough, I don't see that as problem.   I also end up with neck outside neck of .283" instead of norma's .280", sammi max is .283" and on my rifle, I don't need to neckturn.  I load normal loads first firing, you're not blowing out case much.  I reduce norma case load by 2gr, when using these formed cases, volume is less, so pressure is higher.(just like mil case on 308 or 223)  hopefully pics come out, my cameras not the best.  I did a search on forming 257wby brass from 7mag and found a lot of info, it worked for me first time and is well worth the cost savings.

I would expect to form 270wby brass from 7mm, you would have to fireform, as most of inside radius is formed on 257wby, because on the amount you're necking 7mm down, I don't have 270wby, so I haven't tried it.

Cases before sizing.

Cases after sizing, notice shorter neck on reformed 7mm case on top.  You can see most of radius's are formed, inside 100% outside 95% or so.  I haven't annealed, but I suspect it may leave radius more fully formed, if you did.  I haven't had neck spilt issues, so I haven't bothered.

These will fire in 7mag, accuracy is poor, so I would mark them.  I don't have a 7, but my SIL does, they fireform right back to 7mag cases.



Edited by RobertMT
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Post Options Post Options   Thanks (0) Thanks(0)   Quote varmintcaller Quote  Post ReplyReply Direct Link To This Post Posted: 09 March 2012 at 10:52
Thank you very much for the information. looks like I get to add another dimension to my reloading. I am certainly going to give it a try..thanks again
Molon Labe "Come take Them"






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