I shoot F class w/ a SSS stock (see my posts elsewhere on this site) I use the SEB rear bag and have been very happy w/ it. Filled it w/ the "heavy sand" and it stabilizes the whole thing so that it mattered at 1000yds, taking me from the middle of the pack to closer to the front, w/ the addition of the rear bag and Nightforce 12-42x br scope. Thats all I changed. I could, aim better, it was more solid , etc.
Bookmarks