I guess I am a little confused on targets #1 & 2. Was the first target from a cold clean barrel? I would say that target #3 gave you no useful info. It would have been better to run three sets of 3 shot groups with the three different powder loads. Maybe I am wrong, but what were you trying to gain from target #3? You mentioned deer, so I think you are interested in a good hunting load. I have found that when working with loose powder, I work in 5 gr. increments. You could even narrow it down to single increment loads, but this would not really accomplish much, IMHO that is of course. But I am sure you would have the fun of shooting the tests though.

One thing I can say about working up these targets is the fun of it. I love doing test loads. They serve to give us some great info and have a bucket of fun while doing it. This is why I don't consider it work!!!

Keep up the good FUN!