In this video I’m breaking down why your .22 isn’t “randomly” losing accuracy — it’s getting sabotaged a little bit at a time every time you shoot it. Rimfire is famous for being cheap and easy to run, so people blame ammo, optics, or wind when groups open up. The uncomfortable reality is there are a few hidden mechanisms working together inside the barrel and action that slowly degrade precision until one day your tight groups turn into scatter. I cover five big culprits: the hardened carbon ring that forms at the throat and can swage soft lead before it ever hits the rifling, microscopic abrasive particles in rimfire priming compound that effectively grind the bore over time, and how semi-auto feeding can deform bullets and create instability in flight. I also explain the transonic “death zone” and why high-velocity .22 ammo can actually perform worse at distance, plus the maintenance mistake that ruins more accuracy than people want to admit — improper cleaning that damages the muzzle crown. The takeaway is simple: some issues are reversible with the right cleaning and ammo choices, and some become permanent if you keep assuming a .22 is “low maintenance.”