At close range the Masterton is better, we all know this. But, it takes up a lot of amo to get one kill. You can get a kill with one or two shots at times, but even if you hold down the shoot button for a nano second you burn through 6 shots. If 1-3 players are there though you will kill all of them which is nice. At mid - long range though it takes 6+ shots to kill somone, and the gun recoils a lot which makes this even harder. And the Masterton is really good for 8 kill streaks, then you run out or have hardly any shots left. (you get 48 shots in total). So I only use this gun as a multi task gun on one of my Snipers, and as a 'bum rush' class for archives and sometimes Nightclub and Industrial.
But I did love the Stauger UA-1, it's a really good gun with a Laser or ACOG. One used with HH you can spam 40 shots down an ACOG sight which is sick or Out Post.
Mod edit: No double posting.