Ordered this scope for my Optima 209 .50 cal inline muzzle-loader, and was quick to site in and very accurate. I was able to get 1" grouping at 100 yards. Scope is also very clear. I stayed at the range until dark, and even with very little light I was able to see the target clearly. I just ordered another one to replace the one on my .22. Can't beat the quality and price.