Nice to have it come filled, but does not work very well for rifles with protruding magazines I found. Worked nice with my Bolt action rifle, but would not really work with my 10/22 with a hi-cap mag. I guess if your rifle had a really long forearm it may work, but I don't think it would still do very well as that would make the rifle too tippy for accurate use.
So, in my opinion, they did a good job getting it full, not too heavy, and nice for a bolt action, other than that I would fing another option.