with the Macarri spring? Did you install it? Did you do any chrono testing/readings?
Just curious: What kind of scope is that in the picture on your 34 and what kind of mount & scope are you using on your new 350 .22 rifle? I also got a 350 .22 a week ago and having problems with the mount & rings.. so I 'm trying to get a feel to see what people are using on their SuperMagnum springers.
Yes, the 350 can definitely deliver a punch. It had devastating results on a big adult (15lb) groundhog's head I shot at 21yds with the C/Premier 14.3gr. Very quick humane kill. I think I bought the heavy Kodiaks for nothing

Awesome hunting rifle for your heavier 10-20lb pests like woodchucks, racoons & possoms. I would not get the 350 for just plinking and target shooting. It's a hunting rifle with velocities of 850+fps in .22