Just bought and resealed an old 1300 Crosman pistol, pure nostalgia as I had one as a kid.

Works fine now, very accurate at 10m, trigger pull does get stiffer as you pump it more, will polish and lube the trigger up on next phase of fiddling and report back on here.

Did a comprehensive over pumping power test over my chrony if anyone is interested in results as I was concerned that this might go over UK limits. It doesn't as the power increase per pump tails off after many pumps and it remains about 5.5 fpe.