i had a post on here about trading my optima's for the cabela's timber ridge, well i traded and set up my scope with what i thought was 80 grains 777 and a 295 grain powerbelt. today the friend i traded with wanted to go shoot to get used to his gun, and when i loaded and fired my groups was high about 4 inches and the best group was 4-5 inches. when i set the scope the other day i had 1and 1/2 inch groups. i shot a little more but my shots were no better than 4 inches, i was thinking the scope, then my friend asked was i sure about the grain i used the other day. so i decided to drop down to 70 if that didn't work go to 90, but i was sure that i used 80. well i used 70 when i loaded and fired bullseye then a second shot about 1 inch to right but still in center circle. i thought about trying for 90 to see how they group but decided that if i can hit at 100 yds then i'm good to go. but after i got home i got to thinking is 70 grains of 777 enough for deer out to 150yds?, i have never used that small amout of powder. and i'm wondering why my gun won't shoot 80 good?,and if 90 would be better or worse? so have any of you all shot just 70 grain of 777 and if so is that enough to kill a deer cleanly? thanks for any help.