It's not only the boredom, but I've just not bee super impressed with my Fullfield. It's decent, but other than that, I don't have a lot of other great things to say about it. I'm pleased with it and that's why I'm keeping it on the rifle it's on. But I'm not so pleased with it that I'd go out and buy another. I have 3 Nikons and I like them a lot more than the Burris. But I'm looking for a little variety.
I've seen the Muellers on a lot of .22 rimfires and people say lots of good things about them. I've just never heard of anyone using them on larger calibers, especially a .300 Win. My only balk on those is whether they can handle the recoil and still hold zero. I've just never heard anything good or bad either way about them on larger bore rifles. People that shoot rimfire sure say they're good though.