I purchase a 1000 rounds at a time from Ammotogo. I probably tried at least half the brands out there. I own a number of 9mm and .40s Semi Auto handguns from Glocks, Rugers, M&Ps, Walther and Kahr. What I learned is not all guns like the same ammo. I have my favorites are HST 124 gr and 147gr, Talon 124gr and 147gr., Gold Dot 124gr and 147gr. I buy the same for my .40s but only 180 gr.,but looking at 165gr. Cost is not a factor when you put a price tag on your life. I live in a CCW state and I carry everyday. I agree with most everyones post, use what you and gun likes. Example I like HST 9mm but my M&P Shield had an issue with them. I had to modify the ramp to handle them. If you would really like to see different ammo in action, watch tnoutdoors9 on Youtube, he tests all the different brands, weights and calibers. I have learned alot from his videos. He is a Glock guy like me but the bullets will perfrom the same in any gun. Give him a watch, he has over 100 videos.