Years ago I found lots of articles (original) of the Dane and Fin 'irregulars' and their training, loading. Used lots of light load wood projectiles for 'quiet' loads in the woods so no-one would hear them shooting. Powder and primers were scarce as was brass. Never sized, just punch primer and reload. Hid the rifles in the woods. Better training than just pointing a stick of wood. Became good at pilfering ammo from the enemy.