what does this target tell the experienced

[Semtav]

that pattern really won't tell you much unless you can duplicate it pretty much shot for shot.
could be the load , could be the gun, could be you. You didn't give us the temp
I've seen strange patterns with different fouling control methods

Little things like different wad, more powder etc may change the pattern
My 40-65 likes 70 gr swiss 1.5 with a .030 LDPE wad.