I picked up a super clean Beretta 92 FS yesterday and while shooting it today I had a problem with the slide not coming back far enough to cock the hammer. This happened about 25% of the time in 50 rds. I had already stripped the gun down and cleaned and oiled it even though it was spotless when I got it. The only ammo. I had on hand today was a new box of Herter's steel cased. I plan on getting some Remington ammo. tomorrow but in the meantime any thoughts anyone might have will be appreciated. Thanks.