What are your opinions on the USO ST-10 fixed scope in terms of optical clarity and ruggedness compared to a Viper PST 4-16. The scope would go on a medium caliber hunting rifle. I have used the PST and like it very much but am curious if USO has better glass for a similar price on their fixed 10 power. With good glass the 10 power should be enough for hunting medium to large game out to 800 yards.