Mine is an SR9c. I've had it about a year and a half. I've run all weight and point types through it without one FTF or FTE. It's not as small as the little LC9, which is a very appealing carry piece, although a friend who has one told me to manual warns against +P+ ammo. Although the SR9c eats +P+ Ranger 127grn. very well, I've settled on the new Hornady Critical Duty 135 grn. +P.
Regarding different brands and weights of ammo, I haven't had to change my sight setting on the SR9c. Even though adjustable, those sights have worked fine for all weights, except for the 115s, which print a little low. The white box Winchester hardball stuff feeds perfectly, but the groups size is greatly widened from the 1.5 inch @ 25 yards I get from the Rangers and the Critical Duty.
I was never a fan of 9mm until I picked up the SR9c and started researching the 9mm's ability as a defense weapon. I've had a few "shootouts" with my brothers at various penetration/expansion targets, and the 9 showed itself to be as viable a choice as 45 auto, .38Spl., .357 Sig, and short barrel .357M. It even surpasses my favorite gun, the flattop .44 Spl with factory loads.
A little off topic. Got carrried away. My real answer is no, I've never had a feeding incident with any 9mm round in the only 9mm I have. My last outing where a lot of ammo was expended quickly was during annual qualification, a 50 round course. I ran all of the 124 grn. hardballs through it with no problem, and then let my brother qualify during the next round of firing with the same gun, and he used a box of 115 hardballs, again with no problem.