I agree you are correct in the original statement, that the 30-30 is flatter
That was the only point that I was making.I do not use slugs and never would consider doing so,because my average shot at deer would be around 200 yards with the possibility of a 400+ yard shot.The cartridges that I use provide much more energy and a much flatter trajectory than is possible with slugs givenmy hunting conditions.Also wind drift would be a major concern with slugs at longer distances.