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

[Bayman]

Defo check the TP. 3.0 mm

Also check the piston is round and true, and the rod is central.Did that it's good

Check the rear guide when fitted lines up with the trigger block hole (I mean exactly). Did that it's good

Check for burrs on the underside of the cocking slot Did that it's good

Check the cylinder is even as you slowly push the piston down Did that it's good. One of the first things I check is cylinder taper an distortion. I used to build race engines. Sealing cylinders is in my blood. Except maybe this one

Check the barrel lock up stop is allowing a proper breach seal closure (true face, not sloping up or down).did that tried different thickness breech seals. I also spread silicone grease on the seal to check for blow outs. Nothing found. It did seem to break the barrel open slightly and get vertical stringing with more spring

Check it's not over sprung.. a 80/R1 should cock really easily if making just 16 FP in .22 it's not terribly hard to cock but it doesn't feel any easier to cock than my 22 cal Hw95. It has a PG4 kit with 27.5 coils of 0.865" OD 0.148" wire spring. It's running about 25mm preload including the 18mm trigger housing thread

As far as pellets go I'm mostly testing with FTTs. The gun like most of the 22 Weihrauchs I've owned and worked on was most efficient with them. JSBs of any weight wouldn't match the accuracy or energy of the FTTs. Barracuda 18s have like four pounds less energy than the FTTs.

I gotta go I have guests At the house now.
Be back later

[Mach 1.5]

Funny enough I have an R1 which was a webley test rifle. Been tuned by the best in the business but still as a funny click when you cock the rifle. Just like the old 35. Mach 1.5

[MartynB]

Funny enough I have an R1 which was a webley test rifle. Been tuned by the best in the business put still as a funny click when you cock the rifle. Just like the old 35. Mach 1.5

Does it have articulated cocking lever (breach to cylinder) ?

[Mach 1.5]

The R1 doesn't have an articulated cocking lever. It's solid like the 80. Mach 1.5

[MartynB]

The R1 doesn't have an articulated cocking lever. It's solid like the 80. Mach 1.5

Could piston rod be clipping hole in cylinder end block, ie not quite straight ?

[TonyL]

Long shot but maybe worth checking that this isn't connected to the cocking lever, cocking shoe or something in the trigger unit / block?

[evert]

Does the gun have a piston sleeve?

[Bayman]

Could piston rod be clipping hole in cylinder end block, ie not quite straight ?

This would be my guess for the other gentleman's R1. I've experienced the same noise more than once when the spring guide base wasn't large enough to center the guide. The guide would go off center and even a straight centered latch rod would clip the side of the trigger block opening.