A Mo-Rod/Harbar/Accu-strut does wonders to a Mini-14...
I'll admit mine's *****d beyond all recognition at the moment, but it dropped 8" groups down to 3.5" groups by installation
P.S. No, 8" groups weren't norm.....my Mini used to go 2", then one day started tossing a shotgun pattern.....no clue why, don't se a problem
That said: Of 3 of 4 Mini's I know: All group 2" or under with Ultramax 55 SP ammo.
Admittedly they won't stack up against the AR15, but they're not doom and gloom like some people say. Plus, back when Minis could be had for $300-$325, AR15's were going for $900.....you could drop $600 on a mini and getting it shooting near comparable