8300 PSI TOO MUCH FOR 10 GA TWIST

[Big Friend Ten (BFT)]

Pete,

A roll crimp is great for pressure reduction.

Less "ejecta" should lower pressure.

I would start with a "cool" rather than a hot primer.

Mark

[J.B. Books]

Originally Posted by Mark Ouellette

Pete,

A roll crimp is great for pressure reduction.

Less "ejecta" should lower pressure.

I would start with a "cool" rather than a hot primer.

Mark

Mark a roll crimp would be impractical as I would use this load for volume shooting (crow hunting). Good point on the primer, a Remington STS or Fiochhi 616 (209 type) looks like it would bring pressure down further.

I got out my scale and weighed an SP10 wad and the 16ga .135 cards and a .250 16ga fiber filler wad. Ejecta (including powder) is 6% less for the 2 7/8" load. So we would have a 10% decrease in powder, 6% decrease in ejecta and it's using a cooler primer. My guess is this load would be in the high 7000's PSI but that is nothing more than an "educated" guess. I think might try these and call Precision to find out how to go about getting a 5 shot ballistic test done to find out for sure.

http://www.armbrust.acf2.org/primersubs.htm