I assume if you are going to use it off a bench you need the shortest possible. Is that usually the 6-9" model. Tim, by using the same lug as the sling, does it interfere with the sling use at all? Is there pros and cons to different mountings?
6-9" works good on the bench, but i prefer the 9-13" & you can change the ht. of the seat or bags, it's a non issue for this 3" diff.
In some areas of high grass, the next size up is nice & I have done that with success. But with playing with all of the heights & Var./Big Game hunting with the various heights, I have settled on the 9-13" mounted on the rifle & Stoney
Point shooting stiks on my hip, coupled with a good sling. All of my bases are covered with the 3. I have a poly filled bean bag that I use that I can pull out of my BDU type pocket when hunting out West. I use this under the Buttstock when the bipod is engaged. My groups are getting closer & closer to what I can do from the bench with this & you can too. When the grass is too tall which sometimes happens, I can set and use my shooting sticks & with some sling pressure to boot. This is a little better than using the sling alone, which can be dang good with practice.
I like the fixed with the leg notches & with practice you can work one leg back & forth quickly to make very slight adjustments. If & to me a big
IF is the swivel can be the best of all IF you invest in a pod lock.
When my rifles only have one stud. I use the swivel std/hole provided on the Harris.