I suggest you at least shoot two mags of your intended carry ammo out. This way, you know the ammo works with your gun and your magazines. Practice wise, shoot same weight I guess.
Hey travelin, I hope you're talking about more recent Ranger T ammo and not the old Black Talon stuff. Last year, I shot off a few thousand of our old old (say more than 15 yrs old) Black Talon ammo and we had some issues. Ammo just got old from sitting in a humid room. We also had some Black Talon not expand on us as well when testing expansion in garbage cans full of water.
That was old carry ammo that the guys moved from their S&W 4046 to their Glock 22s (I don't know what the thing is with guys wanting to carry the black talons, when we switched to .357, i made all the guys shoot off their .40 cal black talons before i would allow them to carry their .40s as backups/off duty)
Every year, I make our guys shoot off their carry ammo and reissue new ammo.