Scope jar on M-1 A's, M-1 Garands and Mini-14's?

[His lordship.]

I have one of the new Mini-14's and Ruger says in their catalog that they come with a recoil buffer to help stabilize the scope from any jarring due to recoil.  I know that buffer tech offers an aftermarket one, which I assume is for the older model Mini.  This got me thinking as the M-1 A (M-14) and the M-1 Garand D and C models have scopes, wouldn't the heavy jarring of the 30-06 and .308 hitting the receiver cause the scope to get shaken up quite abit, and need frequent replacement?

I know that there is a strong following for the M-14 right now, but I have not heard of any problems. 

[Mnswede]

I believe that with a quality scope you wouldn't have a worry.  I own a M21 which is the M1A rifle with a Leupold Mark 4 10X scope and have fired several thousand rounds through the rifle with scope and have had not problems with the scope breaking etc.  The only scopes that I could think of that you could have problems with the scope not taking the recoil and or breaking would be cheap China scopes.