Chuck H yes I have thought of using #11 taper pin reamer. Bulge is centered about 2 inches in front of chamber. Forward end of bulge probably has to be opened to .750 inch diameter. Doing the math the taper pin reamer will open front of chamber to about .795 inch diameter,just a hair under the max sizing. That m ay be better than getting a custom reamer done up by friend but I still need to look atb the math to include back end of chamber to see if reamer will clear that diametger. I also thought of forming the bulge down on a bore plug before reaming but I don't want to loosen thebarrel ribs.