New to PCP world here. I recently(7/16) got a MROD Gen2 22 Cal and bought a SCUBA tank rated at 80CF @3000. If I can get 15 fills out of it I'll be happy. 15 fills @ +- 30 shots is close to a 500 tin of pellets.That's about what I shot with Benj. NP1 XL that about 1.5 years old. Given all the great things I've about the MROD Gen2 I might be incline to shoot it more than the my XL because cracking that barrel is getting to get old.If memory serves me correctly I read they only fill the aluminum tanks to 2700 to allow for expansion.