Underwood 200 gr. If it's available. Sig Elite 180's are good too. Most commercial 10mm is loaded to .40 S&W speeds.Off the week of the 31st, then back to work for a week, then off for gun season. According to my trail cams I should've been in the woods Saturday morning. Oh well. With nice weather coming this weekend I'll probably play golf, replace the t-stat in my Durango (before the weather gets crappy) and shoot the bow some. I'm also in that group of 10mm back up carry this deer season. Mine is the model 40. Unsure on ammo.