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Old 07-27-2020, 11:32 AM
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C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K  
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Default C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K

I just received some 215 grain swc in 41 Magnum of the Kieth H&G 258 design. I want to load these for a S&W model 57. Doing some measurements of the bullet, I calculate that, if crimped in the crimp groove, the cartridge overall length would end up being close to 1.750. That's pretty close to the cylinder length (even subtracting the 0.060 for the rim). That's nowhere near the recommended c.o.l. shown in any of the manuals! Can the case be trimmed shorter? How do those who load this bullet deal with trim length on the case and c.o.l.? Am I missing something besides brains?
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Old 07-27-2020, 11:47 AM
BigMuddy BigMuddy is online now
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C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K  
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I load that bullet to 1.698 and don’t have to trim brass. Many lead Bullets have to be loaded longer than industry standard 1.590.

Never have had an issue in my Blackhawks or M57’s.

Dan
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Old 07-27-2020, 11:51 AM
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C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K  
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How long is your SIZED brass?? It can be trimmed to 1.280 to 1.270
Depends on where you are seating in the crimp groove as well.
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Old 07-27-2020, 12:50 PM
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C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K  
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I started reloading revolvers in '69 and seated all cast bullets to the crimp groove. On every revolver reload since I have seated to the crimp groove or cannalure and disregarded book OAL, and as long as the cartridge was not too long for the cylinder, there were zero problems. I always thought the bullet designers knew where to locate the crimp groove and have loaded many thousands or revolver rounds quite safely (and accurately) seating bullets to the crimp groove. I don't know how the test labs figured the OAL for cast revolver bullets, perhaps the dimensions noted were what they arrived at with the bullet they used crimped correctly, in the groove. But often the crimp groove was hidden in the case or out too far if I used the book OAL...

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Old 07-27-2020, 05:23 PM
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C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K  
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I have two model 57’s . I have the actual Keith swc 258 . I load this bullet in brass that is not trimmed and crimp in the crimp groove , no problems . Yes it is fairly close to front of the cylinder but never bound it up . Regards Paul
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Old 07-27-2020, 05:40 PM
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Quote:
Originally Posted by bobsdad View Post
I just received some 215 grain swc in 41 Magnum of the Kieth H&G 258 design. I want to load these for a S&W model 57. Doing some measurements of the bullet, I calculate that, if crimped in the crimp groove, the cartridge overall length would end up being close to 1.750. That's pretty close to the cylinder length (even subtracting the 0.060 for the rim). That's nowhere near the recommended c.o.l. shown in any of the manuals! Can the case be trimmed shorter? How do those who load this bullet deal with trim length on the case and c.o.l.? Am I missing something besides brains?
In revolvers, coal isnt really relevant. Load so the bullets doesnt go beyond the cyl face. Use the crimp groove or if the bullet has a very long nose, crimp over the shoulder. Dont make it harder than that. I don't even put calipers to my revo loads, pointless.
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Old 07-28-2020, 01:45 PM
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C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K C.O.L. advice needed for 41 Mag, H&G 258, 215gr, SWC-K  
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Thanks to all of you for the practical, experience based, advice! I was concerned about the cartridge length in regards to jamming the cylinder. I suspected there was no "magic" about the manual's c.o.l. specification, but wanted some advice from you who have loaded rounds with this bullet. Thanks again.
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