Rifle rest or sand bags more accurate?

[SuperMagnum]

Which do you guys prefer to use? I borrowed sandbags from a friend to zero in my 300 wm, have since bought a steady point rifle rest and it doesn't seem to group as well with the rest. Even zeroed in my new 22-250 and it groups good but not as well as I think it should with the rifle rest, probably will get another set of bags. What's your experiences?