what is the mosr devastating 10mm round

[P33v3]

In my G20 I use Underwood 180 gr Gold Dots  DE load 1240 fps in the  winter . The G29 165 gr Underwood Gold Dots.

Those are both good choices. I have always believed that the 10mm should be paired with 180gr and 200gr rounds. 165gr is a good choice for the shorter G29 as it gives it just a little more zip to aid expansion.

[sgtbones]

Big 10 4

[Mike_Fontenot]

In my G20 I use Underwood 180 gr Gold Dots  DE load 1240 fps in the  winter . The G29 165 gr Underwood Gold Dots.

Those are both good choices. I have always believed that the 10mm should be paired with 180gr and 200gr rounds. 165gr is a good choice for the shorter G29 as it gives it just a little more zip to aid expansion.

But it seems to me that when you are moving to a shorter barrel, you perhaps may have to choose whether to try to preserve penetration (which would argue for a heavier bullet in the shorter barrel) OR to preserve expansion (which would argue for a lighter bullet in the shorter barrel) ... I doubt that you can simultaneously preserve both, unless you use a cartridge with a higher muzzle energy in the shorter barrel.  That's my thinking, anyway.

[P33v3]

In my G20 I use Underwood 180 gr Gold Dots  DE load 1240 fps in the  winter . The G29 165 gr Underwood Gold Dots.

Those are both good choices. I have always believed that the 10mm should be paired with 180gr and 200gr rounds. 165gr is a good choice for the shorter G29 as it gives it just a little more zip to aid expansion.

But it seems to me that when you are moving to a shorter barrel, you perhaps may have to choose whether to try to preserve penetration (which would argue for a heavier bullet in the shorter barrel) OR to preserve expansion (which would argue for a lighter bullet in the shorter barrel) ... I doubt that you can simultaneously preserve both, unless you use a cartridge with a higher muzzle energy in the shorter barrel.  That's my thinking, anyway.

According to the Master Ammo Sheet in this forum the Underwood 165gr GDHP is 732 ft.lbs vs the Underwood 180gr GDHP is 670 ft.lbs both our of a EAA Witness 4.5 inch barrel. So the lighter one in this case it would give a little more zip. I'm guessing that you would still see adequate penetration of >12 inches even with the lighter bullet and higher velocity out of a G29.

[sgtbones]

Yeah I could use the 1300 fps UW'S for the g29.