Managed recoil ammo is dandy! In that 7 mag with Remington core-lok mr 140 grain your losing about 500fps and about 500flbs. That means at 300yds you still have 2000fps and 1300lbs of energy. If it shoots out of your gun well, shoot it.
The 4200 scope is also wayyyy over kill.
How is this overkill? A quality scope is never "overkill". As far as a his gun being overkill, I will admit he may not need a 7mag to kill deer,but I wouldnt rush out to buy a new gun because this ones "overkill".