ive got a zeiss duralyt 3-12-50, which is fantastic. the bushnell elite should be a good , ive an old Bushnell trophy on a BSA for years.have you gone of the redfield,which i think belong to leopold which would also be worth a look , ive got a vx 2 3-9-40 on a cz 452 .22 rimi . i guess its just down to personal preferences, but i would go slightly higher on the mag, the 4200 has a huge selection. buy the best you can afford, you never know what rifle you would get next, then youl not have to worry again about scope choices. if like me your 527 .223 is a hunting only rifle go for the enclosed turrets every time. one furthur point; mounts: again personal choice, ive a scoped of these rifles and have found the warne med or high permanently fixed excellent. but with any mounts and scope combination on a 527 check the bolt handle clears the mag ring on the scope. on one of my rifles i used the med rings and had to take a shaving of the handle.