Count this as the umpteenth time I've relearned the life lesson, "it never pays to be lazy." I was out of bedding compound & didn't want to order more since we are moving. But the performance I complained about above & everyone's obvious advice, I ordered, bedded & reshot...viola! Problem solved!
First 3 shots - cold barrel @100m. Second shot went through the same hole, always an encouraging sign.
Second 3 - you can see the group open up and arch left as the barrel heats up.
This was not premium ammo, just run of the mill 150gr Remington core-loks.
Thanks for all the advice guys! She's ready for gun season now.