I bought a mini 30 when they first came out. At the time it was a legal deer rifle where the 14 was not and I really do like the 7.62X39 as a sporting caliber. Being a ballistic clone of a 30-30 isn't a bad place to occupy. But it Shot 10" 100 yard groups on a good day. I sent it back to Ruger twice to fix whatever the problem was.....they never could do it. There were some custom smiths in the Midwest that claimed to have a remedy but the repair was more than the original cost of the rifle. So I sold it. When the internet became a useful place to find information, I studied it again. I wasn't the only person with the same experiance. I have been shooting AR's for close to 50 years, even a worn out training rifle will shoot silver dollar size 100 meter groups.In fact, when they recently released the American Ranch in 7.62x39, they could have incorporated the AK magazine. But they elected to use the Mini 30 mag. Didn't hurt them, as this rifle is an absolutely red hot seller.
And now that I'm backed into a corner, many of the folks that know the Mini 14 is inaccurate, are the folks that have never shot one. I remember very well, a day when me and my friends said any AR is horribly inaccurate.
Magazine interchangeability requirements are a relatively new concern. In the old days, nobody shared magazines. Now, guns are chastised if they do not use a Glock or AR magazine, and nothing else seems to matter. Yep, Glock and AR mags are cheap and plentiful. That has not always been the case. And ironically, because of my long time affinity for Mini's, I have more Mini magazines than any other. I was pleased the Mini 30 takes a Mini 30 mag.