The senario is I have a factory .338 RUM (XCR) that shoot stupid good. Ive actually been trying to justify re-barreling it but just cant...if it aint broke dont fix it. It shoots three SMK's into under 3/4 MOA at its worst, usually much better. The problem is I believe the load that it likes is HOT. Im running 94 grains Retumbo with CCI 250's and 300 SMK's at 2800 (3000 ft. elevation). There is not sign of flattened primers and I get five loadings of the cheap Rem brass. I suspect over pressure because of a slightly sticky bolt, but its not really sticky. It seem more like mechanical lock up, and it only does it every 6-7 shots. the bolt needs a little nudge forward, but then it extracts perfectly. The bolt isnt hard to lift, or even sticky as long as I push the bolt forward a bit. and when I do I can feel a very slight click. So is this a mechanical problem with the extrator hanging up, or am I way over pressure causeing the bolt to set back?