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Fire forming cases
Posted: Mon Sep 19, 2016 6:53 pm
by Alpha1
A dodgy re loading die has left me with a quantity of once fired Lapua brass with the shoulders set back to far. I am reluctant to throw them away. I was wondering if I could fire form them back to original dimensions. Any advice on a suitable method would be appreciated.
Re: Fire forming cases
Posted: Mon Sep 19, 2016 7:39 pm
by Sim G
Load them, shoot them. The cases will then be fire formed to your chamber dimensions.
Re: Fire forming cases
Posted: Mon Sep 19, 2016 11:42 pm
by Alpha1
I am a bit wary of doing that as the shoulders are set back that far the cases rattle about in the chamber.
Re: Fire forming cases
Posted: Tue Sep 20, 2016 6:29 am
by ovenpaa
You could pass a mandrel through them at 7,0mm then neck size only to suit the 6,5 and the false neck with hold the case head back against the bolt face. This does depend on how far back you have set the shoulders.
Re: Fire forming cases
Posted: Tue Sep 20, 2016 6:59 am
by Sim G
I can't see any other way of getting the shoulder forward to where it was before. Much the same way as forming Ackley Improved brass from standard factory loadings. If it makes you feel better about it use the "starting load" data.
Re: Fire forming cases
Posted: Tue Sep 20, 2016 7:39 am
by Alpha1
I like ovenpaa,s idea I think I will give it a try.
Re: Fire forming cases
Posted: Tue Sep 20, 2016 7:49 am
by WelshShooter
You could use a starting load from a load you may have fired before, or you could use a fast pistol powder load which is described in The Library:
http://full-bore.co.uk/viewtopic.php?f=36&t=810
Re: Fire forming cases
Posted: Tue Sep 20, 2016 7:52 am
by The Gun Pimp
Alpha1 wrote:A dodgy re loading die has left me with a quantity of once fired Lapua brass with the shoulders set back to far. I am reluctant to throw them away. I was wondering if I could fire form them back to original dimensions. Any advice on a suitable method would be appreciated.
Shouldn't be a problem - but you could load the bullet slightly forward so that the primer is held against the boltface.
Re: Fire forming cases
Posted: Fri Sep 23, 2016 10:30 pm
by Alpha1
Alpha1 wrote:
A dodgy re loading die has left me with a quantity of once fired Lapua brass with the shoulders set back to far. I am reluctant to throw them away. I was wondering if I could fire form them back to original dimensions. Any advice on a suitable method would be appreciated.
Shouldn't be a problem - but you could load the bullet slightly forward so that the primer is held against the boltface.
That sounds sensible. I just need a 7mm mandrel now. Im frustrated I would have had one made in a heart beat except my Lathe is goosed. I have tried and failed to find a replacement part for it.
Re: Fire forming cases
Posted: Sat Sep 24, 2016 6:38 am
by ovenpaa
Alpha1 send me a drawing, I am on the lathe this morning making a mandrel for myself (31,0mm)