I read this this morning on the internet.
Hi,I was looking for an accurate weight in 40 s&s.This is what I found.The 165gr is really the optimum choice for .40S&W shooters. It tends to be more accurate, have greater muzzle energy and momentum, and it significantly reduces the dangers associated with possible bullet setback (a bullet can, through normal handling, seat itself more deeply just by being loaded into the chamber of a gun, etc). I think you'll see the 180gr loads become less and less popular as time goes on, and within a few years the 165gr will be the standard for the .40S&W, while the 180gr will be all but extinct Squib
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