elk_crazy,
Still haven't bought that scope huh? I think that the 4-12 is a much better choice for the 300rum than the Conquest 3-10. You will feel like you are shooting inside your range at a much farther distance. The 30mm tube will help you a lot and you'll love not spending the $$$jack. Let me know how you like it. Good choice. I hope to let my 300rum bark this time next week. Gone to Co. on Thurs. Good luck!!