Art, surely you don't think the problem is your casting? Remember 4 year ago when you sent those 499g, your first casting? They scattered the same as these, from that old X7. What i did then was cut the OLA off of that rifle.
After i cut the QLA off, here is what i wrote back then
when i arrived in the hills, rain seemed imminent, so i didn't take long placing the target at 48 yard, and loading the X7 with 100g BH, 300g Deep Curl, crush rib sabot, and W209 primer. The aim was the lower bull for all shots taken today. Two shots were taken using the Deep Curl; they are the 2 holes in the lower target.
Without taking time to adjust the scope, the rifle was loaded 3 times with Art' bullet, 85g BH, and W209 primer. The holes dyed green are these shots. Then a move was made out to 100 yard. By now it had begun raining, so the rifle was loaded and fired with Art' bullet 3 times without delay. These are the other 3 holes in the upper target. That uses all the 499g Art cast bullet i had.