Hi T20 might need some help on 35 tuning. My 35K arrived yesterday and looks to be in good nick. Its been unused for a while and is very "dry" lube wise.

I've fitted an Anschutz Dioptre and it shoots RWS Superdomes into one ragged hole at 12 metres however over the Chrono after a squirt of SM40 in the transfer port I get a mere 520fps with Superdomes and 580fps with Hobby. Not great for .22.

I intend to strip, inspect and lube but can anyone tell me what length a std 35 spring should be?. Also I remember many people on here writing that HW springs of late were fairly mediocre is that true?