OK I cant back down from a challenge and to 12boreman's point it was decided that sweat equity was better than real $ spent. So I went right at that replacement barrel to fit it up to my gun. So far so good. The barrel is about 85%,ish on face.

On my gun, the tit, nipple, extractor rod, lever actuator or whatever you call that thing sticking up at the knuckle end of the frame above the pivot pin is wider than the slot at the underside of the new barrel at the extractor rod end. I had to first widen the barrel slot up to even get a start with getting the barrels on. I also had to shorten the extractor rod end of the new barrel a bit so the aforementioned thingy can engage on the end of the extractor rod and not get hung up on the top of it. That worked good and the extractor seems to move with the opening and closing of the barrels as it should. After that the extractor was removed. The under bites seem to be coming on as it gets closer and closer to face but I have not yet made any adjustments to the barrel lugs other than a bit of side polishing to get the width fit in. The cross bolt is not engaging at all at this point.

OK we are at the 7th inning stretch. I have forced my self to back off, seriously think of next steps and then come back when I can be in the mind to be very deliberate and nuanced and out of the challenge (this barrel can't beat me ) mode. Yeah I have screwed some stuff up in the past when I have just powered through.

Any advise on generally what my next steps or areas of focus would be is greatly appreciated? I am not sure of how much contact the new barrel hook is making with the gun's pivot pin but I would think this is would be the next area of focus as any metal I take off the hook will move the barrels forward and closer to coming to face. I have never been real clear about how this gets accomplished. Again any advise is welcomed.

Lastly, if anyone would keep me in mind if they run across a 310 forearm (extractor), metal and/or metal/wood, I want to buy one for the new barrels and need one for final fitting. I looked at all the usual places and even called Simpsons. One will pop up but you may see one before I do.

Many thanks.