I also bought 6 boxes of the 285's based on past experience in my MagBolt. I was getting around 1.25 to 1.5 inch groups at 100yusing 100gr of 777 2F for a velocity of around 1750fps. When I tried them in my GPH they didn't group very well, 14" at 75y using 90gr of 777 3F. For the GPH I think I need a tighter sabot as they went down almost by themselves. I did find 1 sabot and it looked ok but the grouping was not usable. I will need to try some other combinations with them to see if I can find something that works. In the mean time I have a load for the 285's that works in at least one of my guns.

I may need to try out some of these heavier SSB's in my GPH to see how they do for long range possibilities.