Thanks for all the replies. I planned to get a Weaver scout scope, but it looks like I'm going to have to spring for another 70 or 80 bucks and get the Burris.
I plan to order the B Square mount in the next week or so. I can't wait to see what my Mosin will do when I can actually SEE the bull at 100yds. It ought to be a shooter... it'll do an inch or less at 50yds, with open sights and my eyes. I can't see the bull well enough at 100 anymore to achieve the confidence level I like to have for hunting.
I always felt that if I got to the point where I thought it was time to bury my firearms, it was actually time to pick them up..