Hey Guys, I got a MKII 512 Target with the 5 1/2 bull bbl and my buddy has the 22/45 with the same bbl only his is blued. He has a small 2x scope mounted, mine just open sights. We have put 1000's of rds through both guns with excellent results. Both pistols are VERY reliable! We have shot over 500 rds in both guns, on the same day, numberous times. His feels better to me and my feels better to him! His is a little more accurate with the scope. Go to a good gun shop where you can handle a few different models and get the one that feels the best to you. No way you can go wrong with any of the Ruger 22's....I had a Walther P22 on my short list but now I'm thinking SR22!