Depends on how your CCP laws are drawn out. Here in Tennessee the shooting portion of the class is only to show your ability to shoot, doesn't matter what you shoot. Heck, I used an EMF SAA clone in 45 Colt to take my class. Another guy was using a S&W revolver in 22mag and we had everything in between.
I fully understand that shooting a pellet pistol isn't the same as a center fire gun BUT it IS still shooting and can provide the benefit of keeping one's eye sharp and that's what training is mostly about.
Don't discount the humble pellet pistol/rifle as invalid because they don't use powder to push their projectile. You still need the skill to get hits on target with one and it'll keep you in shooting shape on the cheap.
I'd rather put 200 rounds of pellets downrange then not shoot at all.