This mount i have now is my first one that was the low mount. Previously i stuck to the med mount cuz i was afraid of the bell not clearing the harrel but this time i took a chance and it cleared after all. I think the med will clear up to 50mm plain bell or 44mm w AO. For 50mm AO and above ur better off w the high. I have had a 44mag scope from simmons on one of these rifles w the med mounts.

Brian