It should run okay with whatever you want to run in it. I have 400-500 rounds of Blazer through mine, and it's filthy, but ran fine today at the match as long as I keep it lubed up good before hand. I might actually clean it this week. I don't usually run 'em that long between cleanings but a decided to see if it would impact anything and it hasn't.Thanks, everyone... I am going out again to the range and relax and stay focused better. I know that I will NOT be using WWB ammo anymore, as I discovered that the stuff, is currently extremely foul and nasty!!! My RIA had no problems with the 50 round box, but you could tell, by the end of the round (if it had a voice) it would be complaining about dirty, filthy, ammo!