I've owned a Nikon prostaff 3-9x40 for a few years and it's sat on top of slug guns, muzzleloaders and a .44 mag handi and it always worked great. Tough, clear optics and a decent amount of eye relief.
The 4x is really a rimfire scope but the 2-7x32 should serve you well on a rifle, muzzleloader or shotgun.
Jim