Maybe de-tune isn't the right word. I have a .177 cal 34 that shoots  CPL's about 950-975 fps. Trouble is, it's so harsh shooting that I don't like shooting it much. I'd like to have it shooting smoother in the 800-850 fps range. Is there another spring or something else that could be done to drop the velocity and smooth the firing cycle a bit?

 Kieth,

 One very simple method would be to order the Low Velocity Factory mainspring that's intended for Countrys with Velocity/Ft Lbs or Kg limits.

 UMAREX carries the Mainspring for around $19.00 (the last time I checked). We are all familliar with the quality of the Factory product and can guess that a "Soft" Factory spring will last forever!

 I had a similar idea about de-tuning my .177 Model 34 but changed my mind after a long range shooting session where the incrediable long range accuracy of the rifle became evident. The 34 isa really neat platform to experiment on , and a Low Velocity rifle would likely be a heck of a lot of fun! Paul Watts made a Psuedo L/V "Match" Model 34 that came out great as he told me.

 A full blown , Heavy Stocked, Match Grade, 34 ought to be a real prize. I consider the short, light Stock to be  about the most highly detrimental factor  in shoopting the 34 accurately! The Factory stock has no buttplate and gets prone to sliding on the sholder. The shallow foreend "carries" well afield but a denser wood that is squared at the bottom of the forearm would make things a lot more stable.

 Good luck with your project and please show us the results!

 ZVP