If you're satisfied with the shot cycle and performance I really don't think tuning is
NECESSARY.
I've bought a few HW springers over the years such as a .177 HW50, .177 HW35, .177 Beeman R10, .177 Beeman R9, .20 Beeman R9, .177 HW95.
ALL would put 7.9 grain boxed CPLs into a 1/2" CTC group (or better) at 30 yards straight from the factory package after an initial bore clean and a few dozen shots to season the bore. LOL....here is an old pic of the first patch pulled through one of the .177 Beeman R9s I bought (the price tag gives an idea of how long ago that was).........
Here is the first patch pulled through the bore of a new spare .177 HW95 barrel I bought a couple years ago............
As a side note, the .177 HW95 shot boxed CPLs at 880 fps after the bore clean which is about 30fps higher than I like so I deliberately detuned it to shoot CPLs at about 850 fps when I stripped out the factory dieseling "dinosaur grease" and relubed with non-dieseling Dupont Krytox..........
Here is a pic of the internals pulled straight from the new HW95 showing the tan factory grease...........
Anywhoo.....I personally prefer my twang/vibration free home rolled spring kit based on ARH springs that do indeed last longer than factory springs so I go through the effort to "de-tune" my HW95 & Beeman R9 by replacing the factory spring with an ARH offering. LOL, I have a couple HW factory springs in my parts bin right now with only a few dozen test shots on then.
