I can understand what your saying. I shoot siidelocks, and not one of them is made to handle 150 grains. Two friends I shoot with have inlines made to handle the 150 grain range. Not one of them shoot that. We all shoot around 90 grains of Pyrodex Select. 100 grains of Pyrodex and the right bullet, along with placement should take most any animal I would ever hunt. The only thing I do like about the mag load rifles, is when I watch someone on the range load one up, and then touch it off. I can see that he is not comfortable shooting it. My inline friends told me they can get a better group shooting the lighter charges.. They are not for me, but a lot of people like them.