Long range plinking- 22 or 25 cal ?

[Glock17]

Question for anyone familiar with the hatsan 125 sniper vortex .25 cal!!!:
 It is a serious gun and deserves that feel to command respect but right now I want to be able to make that thing as light as possible so when I go out hunting its easier to manage. Are there any deadweights in the gun that can be removed / anything that could be done to make it lighter?

Any help would be greatly appreciated!

You may want to be careful with this because it could possibly make it more hold senstitve and even tougher on scopes (if you shoot it with a scope) it could also mess with the harmonics of the rifle just my $.02