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<  16ga. Ammunition & Reloading  ~  Rolled vs Fold crimp
Little Creek
PostPosted: Sat Feb 24, 2018 9:05 am  Reply with quote
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What would be the difference in pressure or velocity if this load were folded crimp rather than a rolled crimp?

Fiocchi cut to 2/1/2" 7/8 oz. Solo 1250 20.5 Fio 616 BP SP-16 1060 7100L BPI Roll Crimp

The load is from the powders spreadsheet from the low pressure reloaders group. Source is actually BPI

Question is generally, how interchangeable are rolled and fold crimps?
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skeettx
PostPosted: Sat Feb 24, 2018 12:19 pm  Reply with quote
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NORMALLY, roll crimps yield less pressure, but just a bit less.

https://ballisticproducts.wordpress.com/2012/12/14/does-a-shotshell-roll-crimp-raise-or-lower-pressures-versus-a-fold-crimp/

Mike

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Little Creek
PostPosted: Sat Feb 24, 2018 12:30 pm  Reply with quote
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Thanks, Mike...that's what I thought. The tests show a significant gain in pressure and velocity. Mikex
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