I read all 8 pages of this post and after careful consideration, I'd have to say that my Maverick Sniper in .30 is my best overall accuracy wise.
The digital gauge on the second reg shows no rise, it's flat shooting with 10y & 50y zeros. I can do a cold grouping at 50 yards at 1 MOA.
It hits 100 yard targets consistently. Wind is a concern here so the gun needs a better moron behind it to guess wind drift.
That said, I grab my 500mm Notos 9 out of 10 times for pesting due to its light weight, it's love for cheap CPHP's and fit in my hand and to my cheek.
It gets the typical FX 500mm MOA groupings at 50 yards and hole-in-hole at 30 yards with no wind.
If faced with a coon or whistlepig, I'm grabbing the M60B filled with King Heavies. The Maverick has more energy but I'm not running after critters with a #12 gun!
If you are talking 10m indoors? My BRK Bantam wins hands down. Punching bulls is its claim to fame, it got too boring to shoot, no challenge.