Recently bought a new G35 through GSSF program, so it has the heavier (non "-") connector and fixed sights. Have used three brands of ammo in it and found all to be very accurate, much more accurate than I expected. However, two of the ammo brands used truncated cone bullets, while the third used more of a round shaped bullet with a flat point--Rem UMC yellow box. The gun now has about 400 rounds through it. 250 of the Rem UMC, and 150 of the truncated cones (Fiocchi 170g and another 165 fmjtc load). All 250 Rem UMC fed without a hitch, no failures of any sort. The other rounds, regardless of brand, have at least one failure to feed per magazine. The round typically gets 1/2 way in the chamber and stops, though sometimes it gets almost all the way in. This happens regardless of magazine (5 different ones) or grip. I've even swapped out extractors with my G23 to see if that was the problem, but the same thing still occurs. Breech face is very smooth and clean. I fed the suspect ammo through my G23 and had one round (out of 15) that did not chamber until I reset the trigger, so I'm pretty sure it is the ammo. This problem cannot be duplicated by manually racking rounds through the weapon. Slow, fast, it doesn't matter, it only happens when firing. A local Glock armorer could not find a problem. Glock factory tech support said unfortunately not all guns will fire all ammo reliably. I suppose this is true, but I didn't buy another Glock to wonder what ammo it will or won't feed. What are your thoughts?