One of my favorite firearms, for squirrels, over the last several years has been a Thieme & Schlegelmilch drilling, 16 X 16 over 9.3 X 75R Nimrod. I installed a 22LR einstecklauf in the right shotgun barrel and sighted it in dead on at 25 yards. 35 yards or thereabouts is still pretty much a dead on hold. The left, shotgun barrel is always there for runners I spook and I do occasionally use it. I don't like to but, with the dearth of game birds and bunnies in our area that's about the only chance I get to utilize the drilling. That, and should a 'dillo, yodel dog, skunk or some other vermin show up, they don't take well at all to the 9.3. That happens occasionally.