There are a number of terms about stocks and how they fit, length, drop, pitch, cast off or cast on, and others. All of them have some effect on the feel of the recoil.
All the good fitting in the world goes out the window if your mount is inconsistent.
And, this is also entirely true. Even a perfectly fitted stock will beat the snot out of you, if you don't mount the gun correctly.
knew a fella who had a .300 Weatherby MkV. It was his caribou rifle, had several successful seasons with it. Never a problem. Then, one year, he took it deer hunting. Deer popped out of some brush about 30-40 yards from him, he snapped the gun up and shot. Got his deer.
Also got "Weatherby eyebrow" and a huge bruise covering nearly the entire the right side of his face. The factory stock fit him well enough to not hurt him when used the way he usually used it. Snap shot, no time to mount the gun properly, it beat him up badly.
Now, a 7lb .45-70 with a stock that has the traditional lever gun kind of drop to it, (and a cheekpiece to put your head up a bit for using optics) firing 300gr slugs at 1800fps is going to kick. Pretty stoutly, for some folks, though the muzzle brake should take a lot of the edge off that.