Hi everyone, I am new to this forum, but Took my brand new C9 to the range two days ago, and fired about 275 rounds through it before I left. I used Remington UMC ammo, and WWB. A few things I noticed: With the Remington UMC, I got a FTE at least once per 8rd magazine, and few times the gun tried to double feed - so I guess my pistol does not like this ammo ? With the WWB, I got very few FTEs, the gun seemed more reliable with this ammo. A few times it would seem that after firing a round, the slide would not return to its regular position, so I would have to push it forward a bit so that I could fire the next round. What is this called, and is it normal? Also, could limp-wristing be responsible for any of this? I am not too savvy of the definition, but I think I was holding the gun correctly. This is all straight out of the box new, I did not disassemble or oil/lube any parts before firing. I also left the magazines full for about 2 weeks before firing to help break in the spring a bit. Should my pistol be failing this much? or is it me? Sorry for all the questions.