"whether the average joe could shoot 4-5 inch groups at 100 yards is hard to say..."

Actually, 100yds is outta reach in more ways than one. Those guys like Matthias 72 that are shooting those long ranges use a special scope mount called a "Wolfzeitz"[sp] that is alot like a Horton D-A-R, except itis precision manufactured. Most scopes don't have enough internal adj to sight in at 100 yds. This topic reminds me of when I was a kid about 12 yrs old. My neighbor had an old shed and we kids in the 'hood used to put ballons up on the back of it facing the alley. Then we would throw darts 30 yds or so to try and break a balloon. The ones you usually throw at 10' in a bar. We were bored and "screwing around". Why anyone would want to shoot a 40 yd weapon at 100 or yes even 200 yds is way beyond me, but have at it, just have fun!