There is nothing worse then trying to shoot off a set of shooting sticks when they are not solid.. Nice shooting there... that's a dead deer in my book.
My rifle likes the 300 grain .430 Hornady XTP with a crushed rib sabot. I shoot 90 grains ofpowder as well, and noticed that there is burned powder all over the snow about seven feet in front of the barrel end. Also burned powder to the side if your shooting a flintlock..
Another good bullet with 70 grains of powder are the 375 grain Buffalo Bullet SSB.
Hang in there, this snow will melt some day...

