Yup, a new spring/seal (maybe a Vortek) will be heading towards Wisconsin the minute I get a sub 500 fps reading with the JSB 8.44's. Although I certainly don't want to turn this light weight wonder into a R9. Right now with the 8.44's going 524fps I'm at 5 fpe. If a new spring/seal gets it to 600 pfs I'd be looking at 7 fpe. Since the original velocity was around 550, anyone care to comment on the pros and cons of upping the velocity to around 600 on this rifle?