There are some very sound reasons for trying several different bullet/powders/grain loads. First you will know the best load for your rifle giving you all the confindence of knowing your rifle is deadly accurate if you do your part and secondly, it imparts additional range time which translates to more familiairity of your rifle and of your abilities with it. Remember to shoot various yardages to insure you know hold over for those farther shots. I know my spelling is way off tonight hopefully you see some of my points. I highly reccomend Black Horn powder over pellets, next choise would be 777. If I shot 1.5" groups at 50 yds I would want to shoot 1" at 100 yds.