I had a SII6-24x42, I bought it from my Uncle he had it on a Armalite AR-50. I had it on a .204 after that, never any problems was very clear,Tracked well but adjustment range is limited.

I also had a SII4.5-14x42 that I put thru hunting hell in the snow/rain and heat and it probably still is going strong, I sold it on site two years ago, One of the best scopes I ever had.