I recently bought a UHC super 9 pro airsoft gun. The problem is that .2 gram bbs curve dramatically (a very steep curve) up after about 75 feet or so. The hopup is off, and if the hopup is on, the problem is worse. Will .25 gram bbs make much of a difference, or should I use .30 grams or higher? Note: the fps with .2 gram bbs is about 410. I am hoping the airsoft community at Instructables is willing to help me. Thanks.