| Posted: Thu Nov 5th, 2009 04:52 AM |
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Dragon88
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I just ran into an issue with a new 357 load. With the 158gr LSWC I'm using, the shortest I can make the cartridge OAL is 1.610", which is .020" over max saami spec. If I seat the bullet any deeper I will not be able to hit the crimp groove. Cases are trimmed to normal trim to length. The round chambers properly in my revolver and does not extend past the front of the cylinder.
Is this a problem? Or can I just let the bullet decide my COAL as long as it fits the cylinder?
Thanks. 
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| Posted: Thu Nov 5th, 2009 05:12 AM |
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Rockydog
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Dragon, If it will let the cylinder roll you are good to go. RD
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| Posted: Thu Nov 5th, 2009 10:55 AM |
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OldStuffer
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Yep, in a wheelgun, if it fits the cyl, it's not a problem.
Seating out longer is much less of a "potential problem" than seating it shorter than the tested load. Pressures tend to drop when making it longer, increase when shortening it.
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| Posted: Thu Nov 5th, 2009 01:36 PM |
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fryboy
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if i can i always try to make it as long as possible and still get the crimp in the groove ,the tc loads i load just like a rifle ( well within reason) old stuffer's last line really applies
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| Posted: Thu Nov 5th, 2009 04:17 PM |
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Dragon88
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Thanks, I figured this was the case but wanted to be sure. Does having the bullet farther forward in the forcing cone help accuracy or reduce leading at all?
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| Posted: Thu Nov 5th, 2009 04:32 PM |
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ghrit
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Dragon88 wrote: Thanks, I figured this was the case but wanted to be sure. Does having the bullet farther forward in the forcing cone help accuracy or reduce leading at all?
Clarify, please. You said a revolver, and the forcing cone on a revolver is in the barrel, not the cylinder. Like OldStuffer says, as long as the bullet doesn't extend out the front of the cylinder, you are good to go. Anything longer than that will prevent functioning.
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| Posted: Thu Nov 5th, 2009 05:03 PM |
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Paul B
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Dragon88 wrote: I just ran into an issue with a new 357 load. With the 158gr LSWC I'm using, the shortest I can make the cartridge OAL is 1.610", which is .020" over max saami spec. If I seat the bullet any deeper I will not be able to hit the crimp groove. Cases are trimmed to normal trim to length. The round chambers properly in my revolver and does not extend past the front of the cylinder.
Is this a problem? Or can I just let the bullet decide my COAL as long as it fits the cylinder?
Thanks.
It would be interesting to know what the mold number of that bullet was?????? If it was the Lyman #358429 (I thinkthat's the right number.) it was designed by Elmer Keith for use in the .38 Spl. case and the crimp groove is in the wrong place for use in most .357 Mag. revolvers. The cylinder is too short. I never did figure out why they did it that way.  The simple solution is to just crimp on the front driving band and have fun.
Paul B.
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| Posted: Thu Nov 5th, 2009 05:04 PM |
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Dragon88
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Sorry meant "throat" not "forcing cone".
Bullet is from Hunters Supply. They describe it as a 38/357 bullet, but what you mention there would make sense. They will work fine in my revolver but I dunno about others.
Last edited on Thu Nov 5th, 2009 05:07 PM by Dragon88
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| Posted: Fri Nov 6th, 2009 12:33 AM |
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OldStuffer
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Dragon88, keep in mind the possibility that your particular revolver model may, or may not, have a slightly longer cylinder than the next, another manufacturers, .357. I have no idea what the "standard cyl. length" for .357, if there even is such a thing. All would be made to accept any cartridge loaded to maximum SAAMI standard cratridge length. How much "extra" cylinder length, is entirely up to the gunmaker. On some .357's, the bullet tips are very close to the front of the cyl on heavy bullet, maximum COAL loads.
If this concern applies to you, just be aware of it.
If it does not (no other weapons taking .357), then it's just a passing fact.
Best of luck to ya.
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Dragon88
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That's an interesting fact I discovered from this. MY GP161 will accept a cartridge up to 1.640" long. My 38 snub nose has a much closer tolerance though, which would make since as it's meant to be a compact gun.
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Rapier
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Dragon,
You asked one question that was not answered, I do believe, with regard to accuracy and the forcing cone. In my experiance the more accurate loads in a revolver come when the bullet is long enough to still be in the cartridge case when the front portion of the bullet enters the barrel. Such an arrangemet aligns the cylinder, allows the bullet to center in the bore and supports the base of the bullet, all at the same time.
Best,
Ed
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OldStuffer
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Makes good sense Rapier, seems plausible anyhow. :)
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Dragon88
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Yes that does make since. Looking at this load the nose of the bullet will be well into the barrel as it leaves the case.
Thanks for all the tips.
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