nope, no malfunctions. seems pretty solid.
i'm running it in a crazy competition gun with rifle-length gas, an adjustable gas block, the JP light-weight hammer, aluminum bolt carrier, compensator, etc
i've got the gas tuned way down where it does not hold open on last round (I just don't let my mags run out in competition) in order to allow very fast follow-up shots.
honestly, i can't tell the difference, so no, i don't think it's advantageous. but it was an interesting experiment for me, so i don't regret the time/$ i spent screwing around with it.
as soon as noveske gets around to sending me my upper, i'm going to move the enidine buffer to my full-auto lower and test it in there to see if there is any advantage in keeping the gun on target (i'm skeptical) or reducing cycle rate (probably will reduce it a lot). the real question though, will be whether or not i start seeing problems with the gun gets real dirty, etc.
i'm no guru, but i don't know why your rifle buffer would get beat to hell just because of 7.62. my Knight's SR-25 308 came with a solid plastic (delrin maybe?) buffer. no metal surface on the front. it's not showing much wear.
perhaps there's a gap between the bolt carrier and the buffer?
why beat to hell a $20 buffer when you can beat to hell an $80 buffer?
(btw, what's up with all the beowulf stuff? this is like the 3rd conversation about beowulfs i've heard this week, which is 3 more than i normally hear)