I recently bought a Sig X5 because I wanted the most accurate 9mm I could get. I am a believer that you get what you pay for, most of the time. (Was it worth it? Maybe) Now I need to find out which brand of ammo shoots best in it. So I bought ten different brands to try to find out. I used a rest and fired 5 shots each at 15 yds. to the target, then 10 shots each with a two hand hold. I was amazed at the results. THEY WERE ALL ABOUT THE SAME! So close in fact that I can not determine which brand shoots best. If I had to make a choice I would choose Winchester, Blazer, or Fiocchi. All were 115 gr. FMJ. I did not buy any super expensive stuff. I guess I will try some expensive stuff next.