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357/45 GWM

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Post Options Post Options   Thanks (0) Thanks(0)   Quote usrguns Quote  Post ReplyReply Direct Link To This Post Topic: 357/45 GWM
    Posted: 05 Mar 2017 at 12:48am
My ammo guy is looking for some information and was hoping someone on this site might be able to help.  I believe someone has contacted him to make some ammunition, but he can find no information.  He is looking for the case dimensions and whatever load data he can find for the 357/45GWM.  Please if you have the info he needs and do not want to post it on the board, please PM me or give me a call.  Thanks Larry.... 

If you can't have fun doing it, then don't do it.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AUTOMAG Quote  Post ReplyReply Direct Link To This Post Posted: 05 Mar 2017 at 1:06am
Larry, I know nothing of the Grizzly Win Mag but I am curious to find out.
Good luck!!
"This is the 44 Magnum Auto Mag and holds a 300 grain cartridge and if properly used it can remove the fingerprints"!!!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jw4570 Quote  Post ReplyReply Direct Link To This Post Posted: 05 Mar 2017 at 12:14pm
Didn't Wildey make a 357 Peterbuilt or something that was a 45 win mag necked to 357?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BEEMER1 Quote  Post ReplyReply Direct Link To This Post Posted: 05 Mar 2017 at 2:05pm
Originally posted by jw4570 jw4570 wrote:

Didn't Wildey make a 357 Peterbuilt or something that was a 45 win mag necked to 357?

The 357 Peterbuilt is the 475 Wildey Magnum necked to 357.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jw4570 Quote  Post ReplyReply Direct Link To This Post Posted: 05 Mar 2017 at 2:09pm
Thanks Beemer.  I had a 475 Wildey and sold it.  It had a nice letter from the factory with various articles attached from the previous owner.  One was on the 357 Peterbuilt.   I foolishly didn't copy the paperwork on that.......

Jason
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rumore Quote  Post ReplyReply Direct Link To This Post Posted: 05 Mar 2017 at 2:47pm
The 357/45 WinMag is actually made from either .308 cases or 44 Automag cases, necked to .357.  However, it uses a thinner neck than the 357 AMP, so you have to inside neck ream the cases.  A .357AMP round won't chamber in a 357/45 Win Mag barrel.  The AMP has a neck diameter .010" larger than the WinMag.

Tony

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Post Options Post Options   Thanks (0) Thanks(0)   Quote BEEMER1 Quote  Post ReplyReply Direct Link To This Post Posted: 05 Mar 2017 at 3:34pm
Originally posted by jw4570 jw4570 wrote:

Thanks Beemer.  I had a 475 Wildey and sold it.  It had a nice letter from the factory with various articles attached from the previous owner.  One was on the 357 Peterbuilt.   I foolishly didn't copy the paperwork on that.......

Jason

I ordered a 357 Peterbuilt barrel from the New Wildey Company and had several friends order them also.  They had barrel blanks left from the old company in stock.  The last I talked to them they did not know if they would run any as the interest right now is not great.

They have 44 blanks left also and are planning a run of 44 AMP barrels once they get rolling.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote XP001 Quote  Post ReplyReply Direct Link To This Post Posted: 05 Mar 2017 at 5:10pm
I'm trying to learn by following this thread (and others)so please clear it up for me.
So the 357/45GWM is the 357 peterbuilt? GWM? Grizzly Win Mag?
What case is used? the 44 or 308? or are the same case head style and both can be used with trimming/sizing/necking?
Not yet that I handload but is this stuff listed in handlaod guides? or is it still such a wildcat that's it's "make a your own risk" thing.
I also own a Wildey NIB! One day I'll get around to playing with it, forgot what caliber it is but did read all the info that came with it(forgot most already as it's been years).
Keeping me interested!
Thanks for the info help
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rumore Quote  Post ReplyReply Direct Link To This Post Posted: 05 Mar 2017 at 6:05pm
As noted above, the 357 Peterbilt is made from .284 Winchester cases (.475 Wildey) whereas the 357 Grizzly WinMag is made from .308 cases (44 Automag).



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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rumore Quote  Post ReplyReply Direct Link To This Post Posted: 05 Mar 2017 at 6:13pm
Data by Jerry Horgesheimer - Handgun Quarterly Sept/Oct 1991
6.5" barrel

Tony

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