Nice shooting.

Yes, I noticed how my groups change with the different angle of the sun on the front blade.
It does it with my 3, 3.5 and 5" barrels, there is no getting away from it.
I just hate to have to shot into the sun in front of me !!
It will shade the left and right side of the front blade, depending
on how you handle the weapon to get your shots off at targets.

With the sun behind me or being under a cover at the range is the best for tight groups, for me.

Way to go.