Beeman R1 (HW80) strange ring noise in shot cycle??

[Bayman]

I removed the Vortek kit, inspected the comp tube and piston seal for damage and installed an ARH spring kit with the OE piston liner. Test fired without a scope and the gun sounds normal now. Ten shot string of 5.53 FTTs, 735 fps ES 12 and SD 3. That's 17.58 fpe. That's about what I remember that kit doing last time.

Assuming the noise doesn't return I'd have to think the noise was from the Vortek steel outer guide resonance. I have to do some more testing with a scope on it.

Thanks all for the help
Ron

[Shed tuner]

personally I find 17-18 FP the sweet spot for these... accurate and easy to shoot. Much more and accuracy (or maybe the ability to achieve it) seems to suffer.

[Mach 1.5]

Hi JB..I'd go 19 ft lbs as the sweet spot. Anything more is a little too much. Slight off thread but on FAC power levels I remember shooting a Webley Venom 97 running at 16.8 ft lbs it was unreal..a mild nudge in the shoulder like a legal limit rifle..it was .22 but really nice at that power level.
Mach 1.5

[Shed tuner]

I'd invite you over to play with some of my "fac" springers, but the plane ticket will make it a little pricey - I've not shot them myself for a couple of years !