case forming

[ffwd]

I scored 30 empty .300 Win mag brass at the range. I want to form it to work in my 7mm Weatherby mag. I tried straight full length sizing and managed to put a bunch of wrinkles right at the neck transition. Anyone have any pointers?

Aside from telling me not to use brass that isn't headstamped with 7mm weatherby.

 

[RR]

Trade it to somebody for 7 rem mag.It only takes 1 pass.

 

[farmnut]

Well you will be pushing the shoulder back approx. .2 of a inch, that will be tough to do in one try.

 

[tiriaq]

Imperial Sizing Die Wax is the best lube I have found for case forming.

 

[butch lambert]

New to the forum, but you can go to www.shadetreeea.com. Case forming dies that will make almost anything.
Butch

 

[Syracuse Steve]

...case forming lube....

...I tried Rooster Red case forming lube...it's slightly better and cheaper than Imperial Sizing die wax.....

 

[joe-nwt]

Also watch that the neck brass does not get too thick. It may require turning/reaming.

 

[Dogleg]

New to the forum, but you can go to www.shadetreeea.com. Case forming dies that will make almost anything.
Butch

Welcome aboard.

 

[shootist22-250]

Welcome to Gunnutz Butch.

 

[dan belisle]

Anneal the brass, use a good lube (I like Imperial, but Rooster is pretty good too), remove the neck sizing plug for your first pass, then trim the brass, reinsert plug and run it through again. Measure and turn down neck thickness as required. Really, for 30 pieces of brass, buy new. - dan

 

[butch lambert]

Thanks for the welcome. I have some hunting and shooting buddies that live in Canada and also several customers. Everybody has been great except one gunsmith.
Butch

 

[Eagleye]

When you are resizing that brass, do not put any lube on the shoulder of the case, only the body. The lube encourages wrinkles in the neck as it gathers and has no place to go. Regards, Eagleye.

 

[Johnn Peterson]

Imperial Sizing Die Wax is the best lube I have found for case forming.

X2!! Just recently I did my usual 'shopping' trip at P&d in Edmonton when I was back that way for my Mule Deer draw and picked up three tins on it. Got enough now probably for the rest of my life.

 

[stocker]

I reform 300 Win Mag to 7 X 61 S& H. I have correct reforming dies from RCBS. I lightly apply Imperial to the necks and body but not the shoulder. I use virgin brass. This reforming is more severe than making 7 Wby. If I were using pickup range brass I would anneal the necks and shoulders. I get zero rejects using virgin brass of recent manufacture. I tried older new brass that had been on the shelf for several years and found I had to pre-anneal to prevent dimpling and creases, It had age hardened. I expect once fired brass would behave similarly to older brass. You may have to opt for reforming dies or anneal the pickup brass you have to get good results.