Want to get a Harris Bipod for my 223 used for predator hunting but would also like to be able to fit it to my sheep rifle. What lenght should I get? pivoting or non pivoting? Channeled legs with 1" notches or smooth legs? There are so many models to choose from and there kind of spendy so I want to make the right choice the first time. While predator hunting I am usually kneeling or sitting when shooting. Anybbody ahve any experience with Harris or is there a better brand? HELP!