Hi All , I had done the T06 D460 strip down and lube she's .177 , the breech seal is little off and the velocity has dropped to 860 fps with 8.44 grain I did make a piston sleev using Xray film which kind of smoothened the cocking and recoil but would like to try some tune up kits available , JM , ARH etc ?Can I just replace Spring with Stock Factory spring and breech seal ? where to get that ?IS there any Tune up kit which is available and will make a huge difference in the rifles overall handling and shot cycle ?Cheers,Pravin Dalvi
If they can ship to your location, Vortek has "drop in" springs available. They fit the factory spring guide very well. Making more power would be of little benefit, unless you plan on heavier pellets, 10 grain or heavier. Kits would not make a huge improvement in handling and shot cycle. The do help eliminate or minimize spring vibrations. My Diana 460 was making over 20 fpe originally, I detuned it to sub 12 fpe, and has become more enjoyable. At full power I needed 10+ grain pellets, otherwise would shoot at or near supersonic speeds affecting accuracy. 14 fpe is an excellent power level for your 8.44 grain pellets.