Re: Magnum pistol scopes
The shortcomings of cheap scopes is not so much their optics (which are all computer assisted in design and manufacture) but their ability to hold zero under repeated heavy recoil or the sharp vibrations caused by a semi-auto action.
One major scope company once advertised that their best scope was good for 10K shots on a .375 H&H Magnum. Their next to best scope was rated for 2K shots on the same.
With optics you do necessarily pay for what you get. In the above example the next to best scope would be good enough for most shooters; especially considering that both were expensive scopes and the best model cost significantly more money.
Hope this helps.