I have had a Mini 14 in 222 since 1987. Once I figured out that the accuracy left a bit to be desired I put it back in it's box and have not shot it much. I have since purchased another in 223.
I would love to find a Mini and have a heavy barrel installed, not just a weight hanging from the end and other accuracy work and have other accuracy work on it making it sub MOA.
I believe the work can be completed for about the same ammount as what I have in my Colt AR-15 and have the accuracy be equal