I loaded up a batch for my No4 and tried them today.
I would have liked to have take a photo of the group but I coudn't get it into the picture!
However, after resighting the rifle under zero wind and zero fore-end stress and getting what appears to be sub-MOA with j-words, those PP's hit point of aim at closer range. Made me wonder whether the patch was staying on for some distance? There was no 'confetti'. At least one boolit got pushed back onto the powder. I know this because I ejected the unfired round and left the boolit behind! (And spilled the powder because I did not use a filler as the case was full).
So, back to the drawing board! (It was worth a try!)