The Leupold 2.5-8x32 EER is getting close to the maximum useable magnification for such a pistol on varmints. Much more, and there’s a tendency to lose track of the critter outside the limited field of view.
Because its magnification, elevation and parallax can all be quickly adjusted for different range or for when searching out targets, this Burris Veracity 2-10x42 on my 14” .22LR Match barrel represents a good maximum:
5 shots using LAPUA Center X on 6” steel @ 200 yards, with elevation at 24 MOA above its 50 yard zero. So, there’s absolutely no way this could ever reasonably be called “flat shooting.”
WARNING: As this particular scope is a rifle scope, with correspondingly short eye relief, its use on a pistol with any appreciable recoil would be just asking for eye or forehead injury. While I wouldn’t hesitate to use it on a .22WMR barrel, and possibly even a .17 or .22 Hornet barrel, its use on a .223 barrel is certainly out.
But, Burris also makes a 3-12x32 handgun scope, with appropriately extended eye relief, one of which I’ve mounted on my 14” .30 Herrett barrel. While I’ve not yet had the opportunity to shoot with it, in bore sighting it, I can already tell you that it’s very easy to lose track of a target at 12x. So, its only real advantages over my Leupold 2.5-8x are its parallax adjustment and the elevation hash marks on its reticle:
Those longer yardages seem mighty optimistic.