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 Can 378 Wby brass be resized to 460?
#15652475
01/13/21
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Joined: Oct 2003
Posts: 860
TXbluelacy
OP
Campfire Regular
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OP
Campfire Regular
Joined: Oct 2003
Posts: 860 |
Or is this too much a stretch? I’ve got 25 378Wby brass but had sold the rifle. Need 460 Wby brass and was hoping I could neck size them
...on earth as it is in Texas.
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Re: Can 378 Wby brass be resized to 460?
[Re: TXbluelacy]
#15652494
01/13/21
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Joined: Sep 2008
Posts: 4,760
colodog
Campfire Guide
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Campfire Guide
Joined: Sep 2008
Posts: 4,760 |
I'd anneal the necks and fireform the cases with some cream of wheat loads. MuleDeer can steer you a bit closer in the Ask the Gunwriters section.
"Camping places fix themselves in your mind as if you had spent long periods of your life in them.
You will remember a curve of your wagon track in the grass of the plain like the features of a friend."
Isak Dinesen
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Re: Can 378 Wby brass be resized to 460?
[Re: TXbluelacy]
#15653987
01/14/21
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Joined: Jun 2005
Posts: 511
MikeMcGuire
Campfire Regular
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Campfire Regular
Joined: Jun 2005
Posts: 511 |
Yes but best if you first neck to 416 first and make sure lube inside neck. The Wby shoulder will collapse very easily like the 40 degree AI shoulders. The same applies to necking down, that is, one calibre change at a time. I have necked 416 Wby to 338/378 bit had to go to 378 first.
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Re: Can 378 Wby brass be resized to 460?
[Re: TXbluelacy]
#15654824
01/14/21
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Joined: May 2014
Posts: 4,850
Bugger
Campfire Guide
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Campfire Guide
Joined: May 2014
Posts: 4,850 |
I agree with both responses above. I made 375 WAI brass out of 30-06 brass by opening up to 416 then back down by sizing a little at a time - 8mm, 32, 338, 35, 375, 416 then back to 373 (I needed to go up and back down to get the shoulder right.)
But since then I've used 35 Whelen brass to 375 and then COW
I didn't need to anneal, but it is a very good idea, I think.
Life member NRA
I prefer classic.
Sgt USMC - a while ago
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Re: Can 378 Wby brass be resized to 460?
[Re: TXbluelacy]
#15655064
01/14/21
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Joined: May 2005
Posts: 6,409
AussieGunWriter
Campfire Tracker
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Campfire Tracker
Joined: May 2005
Posts: 6,409 |
Follow Mike's suggestion.
Because the .338/378, .378, .416 and .460 all use the same basic case with only neck differences and because the cartridge head spaces on the belt, there is no need or any benefit in fire forming. It would be a waste of time, powder, bullet and primer.
If the deplorable becomes the inevitable, it is only a small step to the inevitable becoming the acceptable.
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