Lucky,
The mini's are as reliable as sunrise with good ammo, but the average accuracy of them is about 4" at 100 yds, a rare one will do 2", and the guys on perfect union have had some success making them shoot with some very cheap mods.
After many complaints, Ruger tested a bunch of mini's for accuracy, took a few of the best ones and a few of the worst ones and tore them down and measured everything trying to find out why, results were inconclusive and deemed to expensive to fix.
I have 2 that shoot very well that were rebuilt by ARS of Odessa Tx., they were rebarrelled with Lothar Walther super match SS barrels, and a few other tweaks done to the action and a bit of trigger work. The 223 is a 12 twist 22" barrel rebuilt in 1992 and the rebuild was 700.00, the thumbhole is a 6 PPC with a 20" 12 twist rebuilt in 1998 at a cost of 780.00 not including the stockwork. The 223 will shoot about every 55 gr factory load I ever tried into about 1", the PPC shoots a good bit better but is a reload only proposition. Have considered selling the 223 but my 11 yo daughter would disown me.

The guy who ran ARS passed on a few years ago but there is a company that still works mini's do a search for accuracy systems inc. they have a website and do good work on them. also I'm pretty sure that Jim Clarks custom guns of keithville la. still works on them. Hope this helps answer your ?'s.
RR