The platform you shoot from makes all the difference. While a bipod can help steady an otherwise unruly wobble, it is a distant third at best to a true rifle rest (which can run you $800+ for a basic one) or the old reliable sandbag.
I don't have upwards of $1000 to waste on a rest for my hunting rifles, especially since I can't drag the rest with me into the woods. I don't mind bipods so long as they are of the proper length for the planned shooting position (I don't drop to prone in a cornfield to shoot a whitetail, it just wouldn't work). I've found over the years that sandbags at the range used to sight in a rifle are invaluable and cost little.
The sand should be packed loose enough to allow the rifle to sink in a bit at the forend and additional bags should be placed under the buttstock for rear elevation. Adjust the bags accordingly until your sight picture is correct, steady your breathing, shoot on a still (no wind) day and see what the rifle does.
If a better shooter is available (everytime I go to the range there's at least one) ask them to shoot a group. If you still feel it is an equipment problem, look into problems commonly mentioned with your particular model. As mentioned before, technique, practice and a good trigger will likely account for the majority of accuracy gains.
One final note: be sure to clean the rifle, keep it lubricated, tighten the bolts to spec to minimize any play between stock and receiver and make sure of the same for any optics mounts and rings.
Good luck and good shooting.