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357 Herrett Headspace OOPS!

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lfurlong View Drop Down
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    Posted: 01 July 2006 at 04:09
Hello,

I have a problem where I've moved the shoulder back a little too far when resizing 30-30 to 357 Herrett. I'm getting a lot of misfires from my first reloading. I've tried puttting one or more .001" shim washers at the rim when fire forming. This works somewhat. I've got quite a bit of brass with questionable headspace that I hate to toss. Any other ideas?

I've considered tightening the action on my T/C Contender with an oversized hinge pin, replacing the hammer spring and/or firing pin. It also seems to be related to which primer I use, CCI or Winchester and how hard they are seated. The brass is WP once fired with the pocket and flash hole reamed.

Trying to pick up where I left off some years ago. Thanks,

Larry
Larry S Furlong
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 01 July 2006 at 04:36

Ifurlong,

I form and reload the 30 Herret, very similiar to the 357 H.

Some thoughts,

The 357 (35/30-30) should headspace on the rim, but can headspace on either the rim of the shoulder, depending upon the siziing.  If you have oversized rim then the problem of misfires could happen.

I'd not do anyof your sugested solutions, all seem drastic or dangerous...especially the hinge pin 'fix".

But there is a real esy solution for you.  Buy a 375 neck expander button for your 357 die set.  Should cost you about $9. 

put it in your 357 H sizing die (adjust the die to not size those cases you have oversized).  run all the undersized case thru this set up, it will open all necks to about .375 inches. 

Then change back to the 357 neck expander and properly adjust your full lengeth die to the correct 357 setting.  Run all the undersized cases thru this die.

You now have oversized cases with a .375 shoulder annulus.  You can load them and shoot them.  They will shoot on the headspace from the case bse to the .375 fake shoulder, and form fire to your chamber.  then only neck size.

thoughts---- the T?C has a disconnect, which disconnects the firing pin IF the action doesn't close tightly.  99% of all misfires in T/C are the result of this disconnect not letting the firing pin fall all the way. Most misfires are "case too long" not to short problems.   If you are sizing on the shoulder you must snap the action closed or it might not lock, and the disconnect functions to cause an appearent misfire.  Listen when yo close the action on an empty chamber, you cna hear the action lock.  then listen when you close it on one of your cases.  Does it sound the same???

Let me know how it goes and I'll try to help at each staqe.  good luck

BEAR

 

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Rockydog View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rockydog Quote  Post ReplyReply Direct Link To This Post Posted: 01 July 2006 at 16:25
Ifurlong, I think Bear may have hit it right on the head with the disconnect issue. I've shot contenders for 20 years and had problems with the disconnect too. It might just need a good cleaning. Mine was over lubed at one point and ended up gummy and sticky. I removed the grip and cleaned everything with a spray cleaner and then relubed with Remington dry lube. Problem solved. I've also fireformed cases but for 7x30 Waters. I used cream of wheat over 5 or 6 grains of powder and bumped the shoulders out. Similar to the theory behind a dead blow hammer. Probably messier than using actual handloads but I was able to do it it a semi urban/rural setting without pissing the neighbors off and it saved time when I was anxious to start reloading. Now there's enough commercial 7X30 brass that I don't have to fool with it. RD
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TasunkaWitko Quote  Post ReplyReply Direct Link To This Post Posted: 01 July 2006 at 16:55

Welcime to the BaitShop, ifurlong!

lotta good guys here who usually know the asnwers. if not, they're pretty good at finding the answers!

pull up a chair, grab a cuppa joe and post up! if you need anything, contact me or any other admin member~

TasunkaWitko - Chinook, Montana

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