Custom Ruger Mini 14 30 Rifles Accuracy Systems Gunsmith
If you have a bunch of $$$.
If not, go to a good gunsmith and have 2 inches cut off the barrel{ this will reduce a lot of the "barrel harmonics"} and recrown. This will give the gun the ability to reliable hit 2.5-3 inch groups at 100 yards.
Now you need one of these...
I got mine brand new for $675.
I just got back from trying her out and I must say, she's a really nice handling gun. I put 40 rounds down the pipe just to test function, handling and the Pro Mag 20 rounders. They performed flawlessly and even held the bolt open after the last round was ejected. Speaking of ejection, the Mini throws spent casings anywhere from 8-10 ft. away.
I loaded the factory 5 round mag, shot those and everything went as I would suspect. Soda cans didn't have a chance at 50 yards and every round hit exactly where I was aiming. Then I loaded each 20 rounder with 10 rounds each and shot. Both mags were solidly lock into the well with no movement and each held the bolt open after the last round was ejected. With the remaining 15 rounds, I loaded each mag with 5 rounds and proceded to fire approximately 1 round a second. The barrel did get quite hot to the touch so it's going to be interesting to see how this heating effects the shot groups in a future trip to the range.
If you find any Pro Mag magazines, I highly recommend scooping them up as they are high quality replacements to the factory Ruger mags and they're cheaper at the moment.
Here's a couple of pics.