Loved to experiment and shoot a variety of guns.
I had a Weaver pivot mount or the "flip off" on my 270 bolt for years. Never used it flipped off and changed over to a more solid mount. It did hold its zero but there was a chance that it may not be locked down in which I might miss with it. See through mounts offer the worst of both worlds as the mount interferes with the view of iron sights and the scope is too high as some mentioned. As I have shot deer within feet with a scope in the Northern Mn woods I either use straight peep sights and no scope or a scoped rifle with solid mounts. Mostly prefer the scope. The comment about 3-9 V has been made. A 30-30, 32special or 35 does not have the range for a 3-9 V but because they are popular and tend to be the least expensive they are commonly used. A good scope in the 1.5-4.5 or possibly a 2-7 are far better and eliminate the need for a see through. If the scope goes out of whack leave the irons on the rifle and take off the scope.