I shoot nothing but 124/127 +P/+P+ for carry and practice.
Like shooting with the same thing I'm going to carry.
Or at least the same weight and power.
My gun is a G27 with a Storm Lake 40-9mm barrel.
So I'm thinking I can run HOT HOT HOT 9mm day and night.
All Glocks are designed to run hot NATO ammo anyway.
Any G26/G19 should be able to run endlessly on the hottest 9mm.
I'm thinking I may have to replace my recoil springs a little more often. That's all.
Winchester Ranger T-Series 127 gr +P+
Speer GDHP 124 +P
Either round is great stuff.
My G27, with a G23 Storm Lake 40-9mm conversion barrel,
has a big time crush on GDHPs. So that's what I prefer to carry.