Would we expect the velocities of factory ammo fired thru the 3.8” 10mm XDM to be significantly different from the same 10mm ammo run thru the 3.8” G29?
Some makers (most notably, BB, DT, and UW) post the velocity stats of their ammo as tested and shot through various real-world 10mm pistols rather than a factory “test barrel,” like Winchester does. These stats include ammo fired in a G29.
You might want to check their websites for details.