Have a DARNE R-16 in 10 gauge with a similar problem. The gun has 2-7/8 chambers so I've cut down Federal primed hulls and loaded my own. The Federals chamber, but with resistance to being pushed in; they don't just drop in. Fired rounds eject with no trouble, but the unfired rounds often will not extract because the Federals are too tight a squeeze at the base. Nothing, in my case, to do with rim thickness or obturator disks.
The gun is now with Kirk Merrington who is DARNE qualified. He's putting a recoil pad on (primarily to give me a longer LOP), and he'll be looking at the size problem. Expect he'll ease off a few thou at the back of the chamber, but he might just tighten up on the fit between the extractor lever and whatever you call it on the sliding breech that causes it to move the extractors outward. He hasn't told me what's what yet.
I'd check him out before messing with your chambers. V20s need the best...
Hopefully we'll get some word from Ted Schefelbein or Geoffroy Gournet on this.
Regards
Last edited by Tim Carney; 10/21/08 03:43 PM.
