Yep, like your set up (rail on the build) better but didn't want to remove the bbl. Your groups sound good (LOL and believable). My old eyes need help too.
I wonder how many new shooters frustrate themselves trying to duplicate the REPORTED 1MOA and under 100 yd groups claimed on so many sites. My scope has a 3 MOA central dot designed for three gun so at 100, 2" groups make me happy and I smile when I get them.
It is NOT however, every time.
BTW, if you decide to try a Geiselle, I can highly recomment the SSA-E. I was afraid it would be too light but it is fine, smooth and predictable with a distinct stop to stage one and a really crisp, light break on two.