Gene,
The barrels on a Darne are what is referred to as an interference fit. And, yes, it should take a significant grunt to break the fit.
The breechblock appears very simple, and, in use, it actually is. But, there is a lot going on in that little chunk of hardened steel. I'd suggest not attempting to take it down. The lubrication needs of the sliding breech itself are almost nill.
Larry,
A Darne that doubles is a new one on me. I can confess to trying to think too hard on a round of skeet, and having two quick shots in too short an amount of time, but, that is it.
You have it with the right guy. Let us know what happens.
Geoffroy will be home with my 28 gauge Bretelle in a few days, and I am looking forward to it. That is another right guy to have work on a Darne, by the way.
Best,
Ted
