I agree with Jon - both are great scopes. The added advantage of the Elite 4200 is that it has rainguard, which may - or may not - be super helpful for your .22-250 shooting/hunting. Still, I like the Elite 4200s a smidgen better than the Monarchs.
On the other hand, keep in mind that Bushnell is now offering the free rain parka with a purchase of an Elite 3200 or 4200 scope.
Zachary