The doctor gave me the go ahead on putting partial weight on my leg this week. So I decided that on Saturday afternoon I would test this out..:) I made it to the shop for the first time in almost 8 weeks....:) I had Ernie take the HW-97K out there so I could do a nice tune on her. My only gripe with the HW-97K was the spring twang when shooting.
So to make a long story short and not to bore you with all the details, I replaced the piston seal, main spring with JM parts. I custom made a new delrin spring guide to fit the new spring as well. I polished the sear pin on the piston shaft and did a bit of polishing on the trigger parts.
After the tune was complete there was a considerable difference in the over all performance when cocking and shooting. Of course it will take a tin of pellets in order to seat the new seal and guide in correctly. After tune was completed and about 30 shots or so later I asked Ernie to put 10 shots across the chrony. The numbers go: 856, 857, 858, 861, 862,865,869,873, 874, 875. As you can see the numbers are climbing per shot. The deviation is very close. This normal on a freshly tuned springer and the numbers will continue to go up through the breaking period. I would suspect that she will top out around the 890's
Before the tune she was shooting in the mid 900 fps range with a very tight 8 fps overall deviation.
I took some pics of the parts breakdown including the old and new parts.
