No problems Mick
Sounds like you had the same but different
scenario that I did . I got an old 99s as a lockdown project at the start of lock down (very first one) , I accumulated enough bits and pieces over time trying to build another 99s so I had a .177 and a .22 version, I never managed to complete that gun, I never managed to get the cylinder and the back block/trigger block to be able to complete it, when I got the first gun , there on auction site was a broken for spares 99 , cylinder for sale and the trigger block as well, I didn't want them then, so typical , never seen those parts since , eventually I got very lucky and got a 4 month old complete 99s that was cheaper than the lockdown project was . So now I have both guns.
I'll still keep my eyes open for those missing bits . I'm still missing the cylinder , the trigger block the trigger pins to hold it to the block and one stock screw , but that depends what model it is , some use 6mm some use 7mm
. I like the shot cycle of the .22 , but all my other guns are in .177 , so I still have a choice as to final 99 configurations , either one of each or 2 x .22 or if I ever complete my parts search I'll have the .177 and 2 x .22 as well , I'm in no hurry at all . I actually made myself a stock to fit one 99s and got another one nearly new fron the bay
Are you trying to build some custom version of the gun?, the HW50 is the European version of the HW99s or so I was led to believe, they easily make 12 FPE , in fact if you have a seal fail that sucks a bit of Moly through they make 23 fpe without even a bang
If your building a .22 , they easily make 12 even with a soft Titan No.10 in them