Hell yes !
Air rifle shooting and standing unsupported teaches you balance, good sight picture, trigger pull. All the basic fundamentals that will fall into place when shooting bigger calibres inside/outside/prone/in the bush/in the rain. Plus you can shoot 100 times for @$5 in ammo
I'm doing plates timing training with an airsoft under the house and it's helping for sure. Practise and trigger time is pretty hard to beat.
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