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S&W Man · March 17, 2001, 11:26 PM

I have loaded for years and on the 357 magnum, 38 spl, 38Long colt and 38 S&W I now use nothing but a roll crimp. This is designed for a revolver. The taper crimp is designed for a case headspacing on a case front not a rim. I have seen variances in pressures and performance vary too much with a taper crimp in the revolvers. I have never had that problem with a roll crimp. I also shoot 45ACP in my 1917 revolvers. I found that even though they are designed to shoot a autoload cartridge with a taper crimp, they also have less variances in a roll crimp. I mainly use 45 AutoRim in them now so I can roll crimp them and not have to worry about if my 45 ACP's are tapered or rolled.

Also, cannelures were designed for roll crimping not taper, a taper crimp is designed for a smoothsided bullet. That is why most factory crimps on rifle ammo is a modified roll crimp not a taper. Look at the powerful military 45ACP loads and they are smooth wall, taper crimp while the powerful 38 mil ball loads are all cannelured with a roll crimp. There azre definate reasons why the military specs them this way.

Just my 2¢'s worth.

The second admendment GUARANTEES the other nine and the Constitution!

March 17, 2001, 11:26 PM	#5
S&W Man Member Join Date: March 4, 2001 Location: Northern Indiana Posts: 29	I have loaded for years and on the 357 magnum, 38 spl, 38Long colt and 38 S&W I now use nothing but a roll crimp. This is designed for a revolver. The taper crimp is designed for a case headspacing on a case front not a rim. I have seen variances in pressures and performance vary too much with a taper crimp in the revolvers. I have never had that problem with a roll crimp. I also shoot 45ACP in my 1917 revolvers. I found that even though they are designed to shoot a autoload cartridge with a taper crimp, they also have less variances in a roll crimp. I mainly use 45 AutoRim in them now so I can roll crimp them and not have to worry about if my 45 ACP's are tapered or rolled. Also, cannelures were designed for roll crimping not taper, a taper crimp is designed for a smoothsided bullet. That is why most factory crimps on rifle ammo is a modified roll crimp not a taper. Look at the powerful military 45ACP loads and they are smooth wall, taper crimp while the powerful 38 mil ball loads are all cannelured with a roll crimp. There azre definate reasons why the military specs them this way. Just my 2¢'s worth. The second admendment GUARANTEES the other nine and the Constitution!