I just got a screaming deal on a '07 SLR in 351. Since the ammo is impossible to find, I'm thinking about having it rechambered to 357 magnum. Has anyone else done this sort of thing? I understand the chambering is the simple part, it is modifying the mag that is a pain. Any thoughts or comments?
1907 winchester from 351 to 357
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Get someone with a lathe to reduce the diameter of the rim
and deepen the extractor grove. Little short but it works.
Don't worry about barrel size, use 357 or 355 (9mm) bullets.
You can shoot unaltered 357 mag ammo but only as a single shot,
as in loaded in the chamber, don't mess with the extractor.
and deepen the extractor grove. Little short but it works.
Don't worry about barrel size, use 357 or 355 (9mm) bullets.
You can shoot unaltered 357 mag ammo but only as a single shot,
as in loaded in the chamber, don't mess with the extractor.
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farmnut said:
Your idea is the best so far and it works just fine
when used with 9mm (.355) bullets. No excessive pressure whatsoever.
The rim dia of the .357 is reduced to .408"-.410" on the lathe.
As it has no extractor groove yet, cut it on the lathe with form tool which
you can make yourself.
No alteration of the Magazine is needed,
and quoting "farmnut": Please
don't mess with the extractor , and yes, an unaltered .357 cartridge does
work as single shot only. No fun ! A friend with a Turret lathe is very handy!
Bit of clarification and to answer the original question.
No re chamber needed as 357 mag chambers just fine,
the problem is 357 rim will not fit the magazine, I suppose
it is possible to widen the magazine but then the action needs
modification to except the altered magazine, by now you have
enouf money tide up messing up a perfectly good rifle to
purchase custom dies, custom brass and a box of proper
bullets from a custom bullet maker.
If you are worried about high pressure with 357 mag. try it
with 38 Special.
Word of caution when reloading modified 357 mag. cases
with oversized bullets, cases are shorter then 351 brass,
start your powder charges low and stop when action cycles
reliably, this might also help in recovery of your spent brass
cause these things throw brass in to the next county.
Hey You where are you located, I might be persuaded to
convert few pieces of brass for a price of a refreshing adult beverage.
No re chamber needed as 357 mag chambers just fine,
the problem is 357 rim will not fit the magazine, I suppose
it is possible to widen the magazine but then the action needs
modification to except the altered magazine, by now you have
enouf money tide up messing up a perfectly good rifle to
purchase custom dies, custom brass and a box of proper
bullets from a custom bullet maker.
If you are worried about high pressure with 357 mag. try it
with 38 Special.
Word of caution when reloading modified 357 mag. cases
with oversized bullets, cases are shorter then 351 brass,
start your powder charges low and stop when action cycles
reliably, this might also help in recovery of your spent brass
cause these things throw brass in to the next county.
Hey You where are you located, I might be persuaded to
convert few pieces of brass for a price of a refreshing adult beverage.
351 Sl
From:
"The Handloader's Manual of Cartridge Conversions"
"Make from .357 Maximum. Turn rim to .407" diameter. Cut new extractor groove. Trim to 1.38" and full length size. Chamfer."
If .357 Max is not available you could modify .357 magnum rims to the same dimensions but the cases will be .09" short.
Also, don't know if they ship to Canada but if they do:
http://www.buffaloarms.com/browse.cfm/4,165.htm
or
http://www.buffaloarms.com/browse.cfm/4,5765.htm
Sample load data
180 gr. spire point bullet
15 gr. of ALLIANT 2400
1530 fps.
From:
"The Handloader's Manual of Cartridge Conversions"
"Make from .357 Maximum. Turn rim to .407" diameter. Cut new extractor groove. Trim to 1.38" and full length size. Chamfer."
If .357 Max is not available you could modify .357 magnum rims to the same dimensions but the cases will be .09" short.
Also, don't know if they ship to Canada but if they do:
http://www.buffaloarms.com/browse.cfm/4,165.htm
or
http://www.buffaloarms.com/browse.cfm/4,5765.htm
Sample load data
180 gr. spire point bullet
15 gr. of ALLIANT 2400
1530 fps.
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We all have those, this is why we have to be very careful with loading data online, most of us don't have proofreaders and if a new reloader gets to the data before someone corrects it, bango! I shiver to think of 15 grains of Unique going off in a .357 or .351 case.
I knew a guy once that thought all powder was the same. Worked okay for him in the beginning when he just loaded pistol and shotgun ammo. Had some issues when he got into rifle reloading. He doesn't reload anymore....
I knew a guy once that thought all powder was the same. Worked okay for him in the beginning when he just loaded pistol and shotgun ammo. Had some issues when he got into rifle reloading. He doesn't reload anymore....
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madtrapper143
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I would source some .351 SL brass and get some bullets and dies. It would be much easier and not to mention maintain the value of the rifle.
cheers Darryl
cheers Darryl
[
Some common sense advice for people reloading for this cartridge with "oversize" bullets. Start low and work your load up till the rifle cycles reliably and stop there. It has been my experience that with factory loads the action cycles violently and throws brass looong ways. With above procedure you will be kind to your rifle with no problem with high pressure plus you will recover more of your brass. It's always good idea to have a spotter to watch where the brass lands.
Some common sense advice for people reloading for this cartridge with "oversize" bullets. Start low and work your load up till the rifle cycles reliably and stop there. It has been my experience that with factory loads the action cycles violently and throws brass looong ways. With above procedure you will be kind to your rifle with no problem with high pressure plus you will recover more of your brass. It's always good idea to have a spotter to watch where the brass lands.
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