Over the last 10 years I've been switching over from variable power scopes to fixes powers.
I found that when I went hunting with a variable scope, I always had it set at some intermediate power, and it stayed there. So, the question was, why have a varible scope when it's always set at one power?
Many optical benefits of fixed power scopes over variables, like better light transmition, less moving parts, and less costly.
Whoever mentioned above that the big scope makers should make fixed power scopes in 10x and 12x is RIGHT ON.
But, the reality is, those scope makers are dropping any fixed power scopes that they did make in favor of variables, rather than adding new ones of higher power, sadly.
I know that Schmidt and Bender, Zeiss and Swarivski dropped their fixed 4x and 6x scopes from their line-up. I have a S&B 4x36, a Swaro PF 6x42, and a Swaro 8x56 that are superb scopes, far and away better than any vairiable power scope set at these powers.
It's a sad situation, as the image from a fix power scope, given identical glass/coatings, is always better than the variable; same power setting with the variable.
I think that Weaver, and Bushnell have fixed power scopes in 10x; I just have no experience with them.