It's good to see progress is being made.
I appreciate what it takes to bring such a highly specialized bullet to completion.
A 170 class bullet is optimum for larger 277 cartridges.
I hope that they can't be pushed to destVruction in the WSM.
I felt touch of anxiety when I saw the shape of the two groups.
My experience with heavy for caliber 277 bullets and "banana" group shape left large emotional scar.
My "bananas" were much much larger than those posted. Which, by the way, are out standing.
I'll be eagerly awaiting the opportunity to try them in the 8 twist, 3 groove AM @ 3400 or so. Hope they pass your tests, the first time.