I spent some time in the shop this weekend and knocked out a test batch of brass for my 351 made from 360 DW brass. I've done this conversion on 357 max brass, but the DW brass is much cheaper than the the former so i wanted to give it a whirl. also less case length to trim. Once I get everything setup its a pretty fast process, probably about a case every minute, maybe even a little less.
I like using a collet so i dont mark up the cases and it makes changeoput faster too. I use a 1/2' tool blank to set the rim the same location for each piece.
I ground a form tool that will trim the rim diameter, thickness and cut the relief for the extractor. I set the depth with the tool to the right of the workpiece and as i run the carriage in it trims the rim to the correct diameter. I run the carriage to a "stop" point that will both trim the rim thickness and remove the burr i just rolled up from cutting the diameter and i run the crossslide in until the form tool cuts the proper relief.
I give them a quick deburr/ chamfer with a file and move on to the next. i only did twelve so i ahve enough to run a load test, but will get back in and run 50-100 while i have everything setup.
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