I put an ARH kit & piston seal in my 9 month old HW95L .22 after the FPS had dropped. I had about 2K/3K shots through the rifle before the tune. This is a pic of the Weihrauch seal that was burned and damaged.
This is the shot sound after the kit install.
https://youtu.be/zhb_S0BVevs
This is the crono data after the tune.
Created: 05/11/21 10:53 AM
Description:
Notes 1:
Notes 2:
Distance to Chrono(FT): 4.00
Ballistic Coefficient: 0.021
Bullet Weight(gr): 14.66
Temp: 60 °F Partly cloudy
BP: 1020.46 inHg
Altitude: 495.00
# FPS FT-LBS PF
10 707 16.27 10.36
9 709 16.37 10.39
8 709 16.37 10.39
7 712 16.50 10.44
6 707 16.27 10.36
5 708 16.32 10.38
4 710 16.41 10.41
3 712 16.50 10.44
2 710 16.41 10.41
1 718 16.78 10.53
Average: 710.2 FPS
SD: 3.3 FPS
Min: 707 FPS
Max: 718 FPS
Spread: 11 FPS
Shot/sec: 0.0
True MV: 721 FPS
Group Size (in): 0.00