Don't mean to sound like a smart a--, but I really don't think you can load the 125BT's long enough to get to the lands anyway. At least, I can't in my 30-30Win and 30-30AI barrels. I don't have the numbers at hand, but I seat mine just deep enough to get a decent grip on the bullet. Relieing on failing memory here, but I'm pretty sure that I have droped a 125BT into the throat of both barrels and then fully chambered new, sized brass behind it easily without engaging the bullet. But, they shoot very good so I just don't worry about it.
Walt