I've owned an Imbel FAL and they are accurate reliable soft shooting rifles if adjusted properly. If it wasn't ejecting the remington ammo it is probably because it isn't as hot as the surplus ammo. To adjust the gas system to get it to operate with what ever ammo you're using, open it up all the way and shoot a round/close the valve 1 click until you start getting failures to eject. Then open it back up 2 clicks and it should work just fine with that ammo. Congrats on the Fal and welcome to GUNCO!!!