Hello
I have a 1972 Diana Mod 6 pistol which I bought off this forum in 2011. It had been fitted with synthetic seals in 2010 by a well respected member who included photos of the strip and rebuild. Its been great and have used 2000 pellets. Just lately the power seems to have dropped and it is now reading 2 ft. lbs. using Hobby sports Line pellets 7 grain. Never chrono it before What is the acceptable power for this type of recoiless pistol please
Many Thanks
Dave