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Dans Club
February 22, 2009
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Started to hijack the 357 light load thread and thought I'd elaborate here. There is always concern about crimping cast bullets. The key is balance; alloy/crimp/velocity/size etc.. As an example, below are pictures of a 375 SM boolit, wide flat nose-gas check- 12 BHN, that I intend to hunt with this year. The first picture is a sized boolit in the caliper and a loaded, annealed, case with medium to heavy crimp. The caliper shows .377"; .001" over my cylinder throat size.
Next, I disassembled the loaded round with 4 med raps of the mallet.
As you can see, the case mouth opened up and the size of the disassembled boolit is unchanged.
Technically, the glass is always full; half liquid, half air....
July 27, 2013
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Well I don't load for a .375 is it? I do load for a .357 as we load for a number of other rounds. I do crimp my loads, I also use lead bullets, I cast them so I figure I should use them. When I load a cylinder or even lately a magazine, it is loaded with my ammo. I made it, I know what it will do and GOD get in the way. 
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June 25, 2013
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After rereading that web site from Dardas and your question on the beveled base boolits.
I decided today to reload the 357's and 38's with out belling or expanding the case. That beveled base allowed the boolit to set straight and slide in with no issues. I did a light crimp at the crimp groove though with a lee factory crimp die. There was no resizing of the expanded case through the die either.
Endeavor to persevere,
Press on regardless.
Need little, want less, love more.
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Dans Club
February 22, 2009
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Sounds good. With the crimp, you may get a smaller Standard Deviation in velocity- not sure if you clock or not. I've played around with crimping a little to try to get a more uniform ignition. Sometimes I get lucky and some times I don't- that's half the fun. I always make a dummy round so if a load works- I don't have to worry about trying to dial in seating depth and crimp.
Technically, the glass is always full; half liquid, half air....
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