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Old 04-09-2011, 10:57   #9
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Join Date: Jul 2009
Location: North Carolina
Posts: 930
The Gen 4 GLOCKS seem to have fixed the light mounting problems with their stiffer recoil spring, so that will not be a problem in the future.

I like the technical info on sectional density Fred, but there is no such thing as a 105gr .357 sig doing 1600fps in the real world for us to purchase as far as I know.

The ft/lbs are not that far apart even given the seemingly wide difference in number you give for velocity according to sectional density.

125gr .357 = 584 ft/lbs
135gr .40 = 567 ft/lbs
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