A scope that doesn't track is ok if you zero it and don't move it, but it is poison for long range hunting because you must be able to change windage and elevation for different conditions and distance.
Also If you have to "Tap" on the scope after it is adjusted to make it settle in, I consider that scope not suitable for our sport.
Some of the older scopes had a spring apposing the turret and needed coaxing into place. A high quality scope has a positive adjustment and does not require the "Tapping".
Unfortunately some scopes have problems no matter how expensive they are, so most verify the scopes tracking by doing a box test. this is simple to do and all that is required is to shoot one round, bring the turret up 3 MOA and shoot another round, then crank 3 MOA of windage in it and fire one round. Then crank 3 MOA down fire one shot and then crank the 3 MOA windage back towards the original zero and fire the last round. If the scope tracks correctly you should be back at(or very close) to the original POI (Zero).
When setting up a scope, it is very important to get the proper MOA base that will keep the scope in the center of its turret range.
J E CUSTOM