Quote:
Originally Posted by TomkinsSP
Using a lead bullet with two crimp grooves, and using .357 load data, you will get EXACTLY the pressure of the same bullet in a .357 case crimped into the outer groove. That loaded round WILL fit my model 10s or 64s.
That is how Elmer and associates created the .357.
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If they created the two different crimp grooves before the .357 existed, how'd they know where to put the grooves?
The two different crimp grooves in some Kieth .38/.357 bullets are there because the bullets were designed around the .38 Spl case and making room for more powder. When the .357 was developed, that bullet would now stick out the front of a .357 cylinder. A second crimp groove was designed into the bullet to shorten the overall length if loaded in a .357 case.