I agree GC.

Just got in, fired another 6 shots and was amazed, first 3 i shot the same as the other day and grouped 2" " hot outside today" shot 3 more but with a wad, first shot nicked the top right corner of the square and the other 2 hit just a tad bit higher but the 2 went almost into the same hole. So for cooler weather like last evening, they did great, but when it hot super hot like this morning " high 70s" they opened up a lot. So i'll just be adding a wad ontop the charge from now on. Also shot 2 350 grain BS conicals out of my dads cabelas hawken, first 2 With wads grouped 2", I loaded up the same load that i use in my x-150 and shot 2 385 grainer BS conical and the rifle was in business with under a 1" group @ 50. His bore feels a little looser, i think a .502 would be perfect for his rifle and possibly tighten the groups. I got 3 more 385s left so once the rain stops, im going to go out to 100 yards and give it a try. So far i got a new load for this hunting season and im gonna stick with it.
350 and 385s in pappys hawken, i am able to push in with my thumb and index finger. I think thats a little to loose.