This is my main every day carry (EDC) guns. I also carry the Keltec LCP as a backup. I use the small grip back strap and I am able to get a great grip on the gun. I can shoot the XD(m) better that I could shoot my old Glock 23c. I don’t think the XDm 3.8 makes a huge difference in the ability to carry concealed as the barrel is the only thing that is smaller.
I had to cut the factory holster paddle a little bit. It was jabbing me in the hip while sitting.
I had to replace the factory magazine belt holster with a Fobus magazine paddle holster because I take the holster on and off during the day.
The 5.11 covert casual shirts I wear would also hide the barrel of the larger xdm. I draw the xmd by grasping the bottom of the shirt and pulling back it breaks the snaps loose.
The Springfield Armory XD(m) 9mm 3.8 has been a great carry concealed weapon (CCW) for me.