Yes, the SR-22 cannot compete with the MKIII because the MK pistols are proven with their accuracy. The longer barrel makes it more accurate and if you get the bull barrel, your follow up shots will be even more accurate. This doesn't mean that the SR is still not that accurate. Many thought that it would not be able to shoot well past 30 feet. Like other people, I was shocked when I first shot one of these. It was very accurate for a short barrel .22 and I can't wait to buy one. The SR22 is just a fun range gun and a good practice piece because the grip is similar to it's polymer carry counterpart, like the SR9/SR9c, M&P's, Glock, so fourth and so on. The MKIII's grip is based on the 1911 and it is also a good trainer if you're going to carry a 1911. Both of these will eat practically any ammo you feed it, even bulk packs. The SR22 might be a little bit more picky but I know the MK series shoot till they are loaded with carbon build up. Good luck and see which one feels better.