I am fairly new to reloading so I went out tonight with two loads to compare. Started with load # 1( Retumbo ) with 4 shots @ 100yds. This was the slower of the two by 100fps but put two in the same hole & the other two within an inch. The next load using RL25 was a little bigger grouping but still good. So then I moved to 200 yds. The groups then considerably opened up and the faster of the two loads had a flyer that was a good 4" off. So being dissapointed I moved back to 100 & the groups tighened up again. So my question is is possible that it is the loads, or is it shooter error & my ability not to concentrate much. For all the shots I was shooting off a bench with just a bag under the forearm. Also the barell got a little hot so when shooting the last groupings @ 100 I made sure to allow time for cooling off between shots. Thoughts ?