Urgent help needed in Oz

01 December 2004, 11:00

Dear All,

I am in urgetnt need of some assistance, i have looked through previous forums and have been unable to find what i am after however if this has been posted before please send me the link.

I am a crazy aussie with a crazy wildcat that is being built, it is not an idea. I have the dies, reamer, barrel, action and stock, everything is at the g-smiths except the dies.

The calibre is .458 Alpine , basically the wsm case necked up to 458 given a case taper of .006thou and a 40d shoulder

PTAG made the reamer and Hornady the dies, which is great considering i ordered them shipped to Oz and had no problems

Now one of the questions is can i form this case from the RUM cases necked down, trimed and fire form

'or' do i have to go through the difficult process of necking up, annealing and fireforming the WSM case

? They are supposedly the same head and rim sizes, this rifle doesn't need to be super accurate (hunting rifle)

Any help is greatly appreciated....

SSGA

CRAZY LAND OF OZ

01 December 2004, 16:46

DigitalDan

A bit of speculation on my part, but I think your case loss rate would be rather high by necking up a WSM case. Neck down and ream.

01 December 2004, 23:12

Mike375

The other problem you will probably encounter taking 300 WSM up to 458 is the cases will shorten and the odds are high that one side of resulting 458 neck will be much thinner on one side.

If you shorten and then neck RUM cases you will probably need to either ream or neck turn as you will be using the body of the RUM case to form the neck in your 458 Alpine.

Mike

02 December 2004, 05:05

bowhuntrrl

Here's a link to a thread about a .458 WSM. http://www.shortmags.org/shortmags/forum/showthread.asp?topic=19&thread=1619&page=1 This info might help you. I also posted a request for help for you over there. There's a gentleman that's built the .458 WSM. From what I can gather, he fireformed .300 WSM brass and claims there was enough neck tension to hold the .458 bullet.