I tried my newly acquired .243 barrel last week and, brand new out of the box, shot ten of each of the following, 100gr PPU, 100gr home loads, 85 gr home loads and some 87gr home loads.
Off the mirror of my landrover, in an open area with a gusting wind, managed to cover an inch square with randon shots not particularly 'controlled breathing, stable position and target conditions'
This was just an exercise to shoot in the new barrel.
I am more than happy to use 85 or 100 gr bullets in my Blaser barrel and I am sure after a bit of a scrub and range conditions the target end of my shooting will not know which bullet made which hole.