Originally Posted by Mike "ball dodger"
checked and lubed it with synthetic grease.........
That could be the prob. Spyder's do not like grease, synthetic or not. Grease creates drag, STBB's don't like drag. When using Co2, it's intensified. The cold nature of Co2 tends to make grease even more cakey than normal, hence more drag -
Remove all the grease from all the parts and even from the upper and lower tubes, then use oil only. Gold Cup, PMI, any inexpensive paintball specific oil will do -
If you're using Co2, get an antisiphon tube installed in the tank. You''ll have less liquid Co2 in your MR2, less velocity fluxuations and even better efficiency -