what are you shooting like off a good solid rest?? i agree with dalmar. if you are only hitting the paper 1 out of 10 times at 100....you need to only shoot at an animal at 50 yds. a stronger bit of advice might be to upgrade sights to a rear peep/new front post setup and maybe some shooting sticks or a bipod or something. keep shooting, maybe mess around with your powder amount/bullet size and see what works best. IMO you need to be shooting a hell of a lot better groups than where you're at now in order to plan on shooting at something +50 yards. get to the point where you know the gun is shooting right by shooting off a bench/rest.
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Tight Lines,
Josh