Posted this on the Gamo Gate and thought I might post it here in the shop also in an effort to get somemore input. Ed, Gene, Bob any ideas without compromising your trade secrets. I really do appreciate all of the help garnered from this mutual brotherhood of addicts as we are. Just finished a tune on my brother-in-laws Silent Cat .177 cal. The dang thing ain't so silent!! Had a major spring buzz before tuning it, the buzz is less now but still evident. Used 2 different springs in the gun and Delrin spring guide with brass top hat. Can't figure out where the buzz is coming from or how to eliminate it. Anybody got any ideas? I'm stumped at this time. Ordered a new Tarantula spring from JM and will try it that is the only thing that I can think of to do next. Used an E-3650 spring first and then back to a stock Gamo spring, and getting the same results. Any ideas would be appreciated. Thanks.
Tim
Thanks everyone for the input. Here's where I'm at now. The tar on the spring is heavier than on any other gun I have tuned. The stock is the cut away synthetic with the pistol grip and not much there to stuff. The delrin guides have both been fitted to the springs, and the brass top hat is isolated from the piston by a nylatron disc. The Whispers and Big Cats that I have tuned have not had this type of buzz even stock. The bad thing about this gun is at 35 yards it shoots 3/4" groups with the buzz. I would keep it as is if it were my gun, but the main thing he was complaining about was the buzz. I even thought about buttoning the piston to try and eliminate it. Don't know if this would make a difference though. I have 2 Big Cats and 2 Whispers myself and none of them have been a problem to tune and they shoot like dreams. This one has me puzzled. I'm still looking for the miracle guys. Thanks again.
Tim