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Post by jimtx on Mar 29, 2019 8:13:57 GMT -5
Trying to understand this argument, first a 45lc only Blackhawk lacks the headspace , when mfg as a convertible model, headspace is increased but still not enough for moon clips bc it is useless and un-necessary in an SA revolver . Even in old model recessed 45lc & 45acp cylinders this still insufficient headspace to chamber a 45AR I’ve tried. If you milled or recessed the cylinder to accept 45AR then the headspace would then be excessive for the 45acp cylinder, at that point 45acp with moon clips in a cylinder “maybe loaded” but for what in God’s name for? I don’t see ANY reason for moon clips in an SA.
It a necessity in DA revolver bc the cylinders are not bored to headspace on the case mouth as in an SA cylinder . They are milled for 45AR rimmed cases or a plow with moon clips. Some S&W will chamber and fire acps w/o moon clips but extraction is hindered.
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Post by bobwright on Mar 29, 2019 12:38:52 GMT -5
1880's vintage .45 Cole cases will invariably be of "balloon head" or "folded head" design, and should NEVER be loaded to levels that Wil "rival the .44 magnum." Consult the writings of Elmer Keith for reference. I know a bit about loading the old .45 to high levels, in modern, solid head cases. Some loads as high as 57,000 psi, in a converted OM SBH, thanks to John Linebaugh and his magical chamber in reame, and a supply of FC .45 brass, and all the H-110 that would fit, under a 315 grain cast bullet. The likelihood of coming across such cases today is very slim. And since primers are not available for the folded head case, not likely to be loaded at all. Bob Wright |
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rickb
.240 Incinerator
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Post by rickb on Mar 30, 2019 11:29:34 GMT -5
No moon clips here. However back in the mid 70’s I owned a S&W Model 25. Still have the 5 boxes of R&P brass. Fast forward 40 + years, and along came a Ruger 45 Bisley 5 1/2” Convertible. What a fun gun to shoot. For several years I regretted not being able to shoot the 45 Auto Rim in the 45 ACP cylinder. Finally got around to having the back of the ACP cylinder modified to accept the 45 AR case. Now I have the ability to fire three outstanding cartridges from the same revolver. The AR is really a joy to shoot, and extremely accurate.
Rick
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Post by jimtx on Mar 30, 2019 12:59:27 GMT -5
No moon clips here. However back in the mid 70’s I owned a S&W Model 25. Still have the 5 boxes of R&P brass. Fast forward 40 + years, and along came a Ruger 45 Bisley 5 1/2” Convertible. What a fun gun to shoot. For several years I regretted not being able to shoot the 45 Auto Rim in the 45 ACP cylinder. Finally got around to having the back of the ACP cylinder modified to accept the 45 AR case. Now I have the ability to fire three outstanding cartridges from the same revolver. The AR is really a joy to shoot, and extremely accurate. Rick Couple years ago, one of the “big time gunsmiths” we discuss on here advised me against doing the acp cylinder mod to accepted 45AR. He advised to have another cylinder done due to excess headspace on the original acp cylinder when shooting acp’s . I didn’t agree bc the headspace diesnt change the acp round still stops in the cylinder in the same place it would just have more of the case base exposed above the top of the cylinder. |
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rickb
.240 Incinerator
Posts: 28
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Post by rickb on Mar 30, 2019 13:54:34 GMT -5
The machining cut to the back face of the cylinder is minimal. I agree with your statement on headspace. Your Gunsmith was confused.
The only change is a small amount of cylinder support on the Cartridge case. The 45 ACP has a thick web in the base of the case itself.
Rick
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Post by cas on Apr 1, 2019 17:29:57 GMT -5
Yeah the back end of the ACP cylinder isn't doing much, that's why you can chamfer the heck out of them with no ill effects.  |
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