That rifle is a custom by the late Floyd Butler. It has a 26" barrel with a 1-16" twist chambered for the R 2 Lovell and rechambered for the .219 Improved Zipper.
The scope is not "super long" at all and in fact just right for that rifle. It's a 10X Lyman Supertargetspot. I have made numerous shots with it on chucks etc.
I shoot the 50gr Sierra over 4064.