Lots of good advice and suggestions, now I'll throw out a couple :-). First, what's the caliber on that XL, and what's the power with your pellet of choice? I've taken ground hogs with a 14 fpe rifle at 35 yards, but that was perfect conditions, I knew exactly what the range was, and I knew my rifle intimately. PLUS it was a PCP (AA S200), so no recoil. I consider that the limit for taking game that size at that range, but I'm pretty conservative. If it's a larger caliber magnum, it might give you more power and range, but the added recoil isn't going to improve your accuracy. All of which is my long winded way of saying I think your effective, humane kill range is under 40 yards with almost any springer.
Now regarding scopes, that's a different critter :-). Like many, I zero my guns at 30 or 35 yards. I find I like 10X for almost everything, and I've gotten away from AO in hunting scopes. I have 2 of the Center Point 3-9x32 fixed parallax (35 yard) scopes, they're still nice and sharp at 10 yards out to over 50, which is about as far as I typically shoot, and they usually stay at max mag. I have a Bushnell Elite 3200 10x40 fixed parallax on my R9, I reset it for 35 yards. This combo is my current "go to" gun, it's the one I pack around in my truck with me for whacking starlings. No messing around with AO or mag, just point and shoot. And I'm being long winded again. I guess the bottom line is, if you think more mag will help, it probably will so go for it. The only variable power AO scope I have right now is a Burris Timberline 4.5-14, which stays at 10X and 35 yards almost all the time. Later.
Dave