I have a 13.5" to 27" that I used to use all the time, it was a bit uncomfortable to use in the prone position. I then bought a 9" to 13" I love it and almost never get out the old one. Both are Harris and both swivel. The swivel is great and well worth the extra $$. I don't think I would like the 6" to 9" for hunting, off the bench it would be great but walking int he field for varmints is a different story. I never wished my 9" to 13" would go lower but on many occasions I have rasied it up from the 9" position.