You need to establish a shooting form/routine that is the same every time. Everything from where the string touches your nose and the corner of your mouth to the slow breath you exhale while holding full draw. If pulling 60 LBS isn't an issue than i wouldn't go down any weight. If you are trying to hold your arrow back for more than say 5 seconds you will start to notice your pins become a little wobbley. Watch some you tube videos on proper form, How to position the bow on your hand/not punching the release. Stuff like that makes a big difference. Try not to focus on how many arrows you shoot in one day, but how many of them were serious focused shots. I only shoot 3 arrows and make them all count and then wait for other people to finish.