I gambled and ordered 10 more tins last week, just received them in a box with the shredded card board. No opened tins!
I took a random sampling (10-15 pellets)from each tin and weighed them, seems like some tins have lighter pellets then other tins. I was able to divide the tins into pellets over the advertised weight of 7.7 and those that were under 7.7. The tins with the over 7.7 gr were typically between 7.8-8.0, while the ones that were under 7.7 gr were typically between 7.45-7.8. Four of the tins were under 7.7 and the rest were over 7.7. Not sure how much a change in POI would be from 7.4x gr versus 8.0 gr pellet, but I bet there will be some at 30 yards but then again I'm not the greatest shot.