USP,
Thanks for the posting and congrats on your success with reloading.
A couple of questions come to mind.
-- What was your point of aim? With that type of target, it isn't obvious to me.
-- Were you using optics or iron sights? Sitting at a bench, prone, etc?
-- It appears that the group is about 4" across (just an estimate). Is that adequate for the type of shooting you anticipate doing with this ammo?
When you're testing a new load, you want to eliminate as much variation caused by the shooter as possible so you can see the real performance of the ammunition in that rifle.