Jon,
There are plenty of bolt guns that out perform semis at the CMP RS shoots. In the rapid fire stages of the game, the alotted time is more than enough to complete with a manually operated gun, provided you have some practice with it before hand. I regularly finish with 7-8 seconds left and I take my time aiming. IMO, a semi will give you a mental advantage in the game, but in practice, the results don't show any plusses. Check out the scores for the O-class results and note the number of bolt guns at the upper end of the list as compared to semis. SgtMaj Slee's result in T-Class at last years Perry shoot is a bit of a flyer, IMO, considering he shoots for the Army Reserve Shooting Team, IIRC, and the rest of the folks are regular civilian (presumably non-pro). Young Lucas certainly provided a good showing for the manuals.
In my research for finding the right platform for the new class when it was anounced, I had boiled it down to 3 options. Get a military patterned .22 that everyone seems to be coming out with, built up a 10/22, or get a .22 upper for an AR. In my search, I tried all three.
A 10/22 certainly can be built up to perform as well as a bolt gun in this game in terms of downrange precision. One of the attempts I made to configure a gun for Tactical included a modded 10/22 I had used as a bench gun and tried to find a stock that would fit the class. The barreled action shot fine and should have gotten me good scores, however, I could not find a stock that would work well in position.
Another attempt (my first one actually) was to try out a SIG 522 SWAT. A nice gun and off of the bench grouped well enough. In position, though, the barrel not being free floated, the POI was severely affected. Plus, found out in the end it was overweight (I did not have a scale early on). I had the chance to handle the SW last weekend. I'm not sure of its sturdiness with the plastic lower and plastic upper as I like to put a LOT of sling tension on the gun. The gun will handily meet weight though and I hope to see some at the local matches soon to see how well they do.
Finally ended up with the upper AR option which seems to be performing well enough. Just need more trigger time with it to get more confortable.
[I am still thinking about that 10/22 though. It shoots too well to just leave it alone. I'll have to built/modify my own stock to get it the way I want it.]