When trying out new ammo- seldom now because I've narrowed it to Ranger T, God Dots, and HST. I'll buy 5 boxes of it and see how much my sweet n sexy SAS P229 likes it or not. If all 250 rounds go bang with no feeding/ejecting problems I'll consider it good to use in my carry.
Once I have my carry ammo identified I won't shoot much of it because I can't afford to. In fact I still have my same box of fifty rounds halfway used up from when I bought it in March 2012.