I think I need to open up the chokes on the R13 Darne I have worked on. After putting the stock back on I was able to shoot it more extensively this week. I have used both RST best loads and WR gameshot that pattern tight, (the barrels are well regulated and the stock fits me well). The shot was #7 and #7.5
After removing the pits from the bore, both barrels showed an increase in diameter from .669 to .674 thus increasing the overly thight chokes that I started with. Now, RB is choked .030 and LB is.037. It seems that this is outrageously tight for a 16 ga.
I will have to do more patterning as well to better define the chokes on the board and not base my desision on the choke measurements.
What I would like to use the gun for is upland hunting, pheasants and grouse.
First question, is it reasonable to have more open chokes, somewhere in the IC/M range?
Second question, I would love to do it myself. I would use a Brownell's choke adjustable reamer with access from the breech, going slowly and checking patterns on the patterning board. The reamer should have a bore guide and a chamber guide. Any problems with that?
