Ruger Mark III 22/45

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I've only shot mine with MiniMags, Remington Match & Federal bulk. It gobbles 'em up out of all five genuine Ruger magazines. Not surprisingly, the Federal bulk is noticably less accurate than the other two.

Those are the only ones I've tried. My wife's Mosquito like the Remington bulk so she gets those.

I think you'll be very happy with your purchase. It's a fun gun.
 
I own three Ruger .22 Autos: a Standard model, a Mark II Target and a Mark III Target. All would reliably chamber only round nose bullets until I did the magazine tweak shown in the address below.

http://xavierthoughts.blogspot.com/2008/10/mkii-magazine-tweak.html

After removing just enough metal to barely round the corners indicated, all three guns have now fired hundreds of many brands of different bullet nose styles with 100% reliability.

I'd have never thought ten seconds on each magazine with my Dremel tool would have cured decades of jamming with my Standard model. But it did. I have five mags for each gun, each mag got the tweak and all now have worked perfectly through approximately 2,000 rounds spread among the fifteen mags.
 
I have a standard Mk 2. Accuracy with that gun and a 2x optic installed is 1" at 50 yards, 1/2" at 25 yards with federal lightening bulk pack. It gives a dud about 1 out of 200 with that ammo, not that well primed. With CCI, never a problem and it's equally accurate, but I mostly shoot Federal at the range. I have owned this gun for the last 3 years, put probably 3K rounds through it, and have never torn it down. I just lock the bolt back and clean what I can get at. I'll tear it down if and when I ever have to.
 
Just took it out to the range for the first time (picked it up last night around 6). Shot about 150 rounds, took about 50 to find my sweet spot.

The other pic is 20 rounds out of my glock 22 at the same distance, 15 yards. Not so great but good enough for SD.
 

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I mostly use Walmart Federal bulk and have never had a problem. I have also used Stingers and CCI with no issues. As mentioned, you may want to Loctite that rear sight down real well.
 
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