I have the Simmons Pro-Diamond 4X on four muzzloaders, one of which has well over 1,000 shots out of it with some pretty stiff loads and heavy bullets. I've yet to have a failure with them. Like Cayugad, I paid around $30 for the oldest ones and around $40 for the last one. They are now in the mid-$50 range. https://www.amazon.com/Simmons-ProHu...ons+prodiamond

I find them to be clear, sharp and bright with no fuzz or blur around the perimeter of the sight circle. As for magnification, a 4X is just dandy for hunting and quite satisfactory for target work out to 200 yards.