Yes, I have the 3-9 on my son's .30-06 ~ 3 years ago and is holding up very well with 165-180 grainers. It's not an assumption but a favorable personal experience, they are very well built. I don't consider them "cheap" but rather nicely priced for the budget conscious hunter/shooter. In short, it's a good scope for the money. The Revenge line is also gaining grounds.
I compared it with similarly priced scope like the Nikon ...
My co-worker had exactly the one I compared with and he let me field and range test it. My son decided on the Redfield.
For ~$400, check out the Zeiss conquest. Good luck and happy safe shooting/hunting.