I’ve never seen a scabbard that would accommodate a tall elevation turret including my own. Even with a low mounted Leupold and regular turrets it’s often a snug fit and it should be. Never ride with your rifle slung in your person.
I agree with mounting the scabbard so the stock is pointing rear wards. As mentioned here by KC, I think, I’ve had it mounted in reverse and had a branch get wedged between the stock and the horse and unless you have a remarkably gentle and tolerant horse you might be in for a rodeo. I’ve been in a couple — it’s fraught with bad outcomes.
A side note, take the sling off of the rifle before placing it in the scabbard as I have also had a stick pull my rifle out by catching a loop. As we were in a foot of fresh powder snow, I never heard it and by the time I discovered it we were another mile down the trailL. I found it by shuffling along as it was underneath the powder. If you’re going to walk anywhere you’ll have time to sling up.
My view anyway. 🙂
