[TIEKEN]

Hey all. Wondering if anyone can drop a quick note about the differences in these muzzle velocities. I know there is a bit of difference but is it negligable or significant. My intended use would be range time, personal defense and poss hunting (at some point in the distant future). Thanks

[dizmodeus]

Depends on the ammo but 100 to 150 fps difference on average

[GRT45]

Hello TIEKEN, welcome to Glock Talk.

GT member icelandicstud made some videos with chrono data that were very helpful to me. He posted the videos here: Range Trip - Glock 29 20 & longslide 10mm stuff. I summarized the results pertinent to your question below:

Underwood 10mm 180gr GD JHP

G29 with 3.78" Storm Lake barrel: 1262 fps avg
G29 with 3.78" Glock OEM barrel: 1231 fps avg
G20 with 4.60" Lone Wolf barrel: 1346 fps avg

Underwood 10mm 165gr GD JHP

G29 with 3.78" Storm Lake barrel: 1362 fps avg
G29 with 3.78" Glock OEM barrel: 1308 fps avg
G20 with 4.60" Lone Wolf barrel: 1409 fps avg

Underwood 10mm 135gr GD JHP

G29 with 3.78" Storm Lake barrel: 1524 fps avg
G29 with 3.78" Glock OEM barrel: 1499 fps avg
G20 with 4.60" Lone Wolf barrel: 1630 fps avg