RAT76 said:
[quote author=wheelguy link=1259786298/0#5 date=1259893801]or on the slide bar that presses against the topmost round
OOPS!!!
That slide/hammer interface bar is one of the places that SHOULD have a light coat of grease. Along with the slide rails & assembly pin.
Check GL's lube recomendations.[/quote]
I can't say it'll work for everyone, but that was one of the things I did to get rid of dented Hollow Points. For the hot loads I like to use, a rampectomy alone didn't work - so I started NOT lubing parts that might cause the top round to slip during recoil, and the bottom surface of that bar holding down the topmost round is the prime suspect.
What I believe is happening is this. Prior to firing, the top round may have slid forward a bit due to the forward force of stripping off the round on top of it. Then, during recoil of the one in the chamber, friction between the bottom of the bar and the top round pulls the top round back where it should be - preventing the ramp from hitting it.
If someone can explain or show a slow motion vid of what's really happening - I'm always open to advice.