I have one, a 6x25x44 (or something close) mildot on a Savage 10fp .223.
I bought it for a prairie dog hunt years ago.
I sighted in at 200yrds and figured out where the dots hit.
It stayed sighted in the whole week with no issues being bounced around. Is it a repeatable zero? Couldn't really tell you, but it holds zero.
I can keep them all in about a nickel at 200
You may want to check out Athlon Optics. I am in the same boat considering Mueller, but found the Athlon lineup and I am going with one of their scopes.
Mueller optics seem to have a good reputation on several other forums I'm a part of, I personally have never looked thru one let alone shoot a rifle equipped with a Mueller