Mark, I never crimped a brass shotshell. I would think it wouldn't last very long - that's why everyone glues in the overshot wad - the brass shell would last forever. I had at one time 14 boxes of Magtechs and loaded black powder. It just got to be too much of a pain in the a** to clean them. Sold every thing to a cowboy shooter. I run the shotgun venue at our club and we shoot three times a week. My wife and I go through about 24 to 30 boxes of shells a week. The Remington hulls in 12ga will reload 10 to 20 times before I throw them out. And the cheap " Gun Club" ones are laying everywhere. For that reason I like a nice deep crimp. I believe when useing the roll crimp you'll have less pressure than a star crimp. That could be helpfull if you're trying to keep pressure down. Just about all my guns are damascus barreled so I'm always watchfull of reload pressures. Paul
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