Chief38:
Great Information! I carried the Winchester 158 gr. SWCHP +P load for years in a model 60. When I switched to a 637 I loaded it with the Speer SB 135 Load. I was disappointed to see the chronograph results of the Winchester loading; I don't have any around anymore, but I thought they were advertised at over 850FPS in a 4 inch barrel. Have you thought about taking your testing a step further with these loads by doing penetration and expansion testing in ballistic gelatin? The FBI load v. the Speer 135 load would be interesting. Thanks for the good info...
Best Regards
Great Information! I carried the Winchester 158 gr. SWCHP +P load for years in a model 60. When I switched to a 637 I loaded it with the Speer SB 135 Load. I was disappointed to see the chronograph results of the Winchester loading; I don't have any around anymore, but I thought they were advertised at over 850FPS in a 4 inch barrel. Have you thought about taking your testing a step further with these loads by doing penetration and expansion testing in ballistic gelatin? The FBI load v. the Speer 135 load would be interesting. Thanks for the good info...
Best Regards