A few years back I liked Xtreme 165gr with Power Pistol.  It produced a nice fireball. 
Now Xtreme is to expensive for what you get.
My standard load was Xtreme 165gr with 8.7 PP oal= 1.265  with G29 Barsto barrel.  Avg 1160 FPS .
I always thought the accuracy was good but never really sat down and tried to get great groups with it.
Same load with my Lonewolf Glock with 6.5" barrel was giving me Avg 1325.

I loaded all the way up to 9.9 to 9.95gr of PP.  I was getting low 1258 and high 1287.  This was out of my G29 with a BarSto barrel.
Out of my Lonewolf Glock with a 6.5" barrel I was getting around 1450

I also use HST from American Reloading.

They feed great in all my 10mm barrels.  Feeding seems to be my main issue these days.

I just notices how cheap shipping was yesterday.  I may have to start using them.

I have a G29 and Lone wolf G40 clone with their new slime frame.  On my G29 I have a bar-sto barrel.   I never felt safe shooting max loads in a glock stock barrel.
I thought it was standard practice to replace the glock stock barrel for a barrel with a tighter chamber.
But since no one mentioned it I could be wrong.