I have same rifle with a Marl 4 Leopold and 50 mm bell in medium height Mark 4 rings with a Ken Ferrel 20 moa bases. I still had to go with a Karstens cheek piece here is a link.http://karstenskydexcheekrest.com/ he has 3 different model's. I have model a and an eagle stock pack on that works great. Give Karsten a call nice guy and he will hook ya right up.