Well that brings back some memories! A well used Tyrol 5022 was my first .22 rifle when I was a kid. It was also tremendously accurate. The bolt lockup was rather funky though. The bolt handle bears directly against the receiver and wear on the receiver can develop sufficiently such that the lockup isn’t tight enough and the firing pin no longer strikes the cartridge rim with enough force to detonate the cartridge. An easy fix though. Just a small weld on the receiver at the bolt handle cutout and file to shape and voila! Rifle goes bang again! I loved that little rifle...