this was a timely discussion. The last two post above mine seem to confirm my thoughts as well. I have a glock 29, with factory barrel.. I wanted a reliable gun for back up defense while in the woods bowhunting, hiking, turkey hunts, packing meat, etc. Before spring turkey season, I bought some underwood 200 grain and plan to clean my gun and shoot a few of the 200's so see how they group from my sight picture. After that, Im ready for turkey season with a 10mm on my side as a just in case measure. I don't plan to reload, so cleaning the gun and minimal shooting of the heavy hardcast is my plan.
Im surprised the "tumbling" of bullets never came up. There is a youtuber called hickok 45, and he does lots of gun videos. There are a few in the series of 10mm glocks, and he shoots a variety of ammo through them. I think he experienced tumbling on the hardcast over 200mm, but im going off memory. Just thought I should mention that. I should also mention im new to the glocks as well. I did some research over the winter, and knew I wanted a 10mm. I was going to go with the Glock 20, but a deal came up on a 29 that I couldn't pass up...so its mine now. LOL.
To answer the original posters questions, for my glock 29, mods are none... kydex holster that will attach to my pack and that's it. I didn't want the barrel sticking out the bottom of a holster so that I can get clogged with mud or dirt when the pack is going on and off.