Is it a "sin" ? Nonsense. I realise that this was used in a euphumistic sense... but, I think that you should install whatever type of scope you wish - to h&## with anyone else's opinion. I absolutely agree that one tends to get what one pays for with optics. But, just because the rifle cost $1200...this doesn't mean that a good, workable scope must cost $1200 as well. There is a lot of scope "snobbery" out there. It seems that, to many involved in the shooting/ hunting sports, that the brand of scope is more important that the success of the user. It often seems that way, in any case. All that is really important is whether the scope works as intended...and thus, the character of the RESULTS. I certainly realise (and agree) that the odds of good results are much better with a fine piece of optical equipment than a cheap one....but there can be exceptions. The heart of it is - are YOU (the owner/ user) satisfied ?