8 to 15 yards? 24 feet to 60 feet? In a tree stand...I can see. Sneaking up...well, lets just say that I have been hunting for 30 years now. With all those leaves under foot, even when nice and moist with morning frost or dew, sneaking to 24 feet...well...I think it reaching into a tall tale fish story. But that's my belief. With their acute hearing and sense of smell they can hear my creaking bones, or when I was younger smell my bubble gum breath, a 100 yards away.
Alot has to do with how "wild" the deer are or more so how use to humans they are. Around my area they are getting to be almost like cattle and a lot more brave. Last year i had one on the deck eating the tips off the Xmas tree! ... couple weeks ago, had a small spike buck come up the creek between me and the neighbour at 11 in the morning while the kids and I were loading firewood into the truck (not what you would call being quiet)... my daughter pointed him out, he was just standing there watching us! Hopefully, he is still hanging around next week!
It is a dear cartridge.
Some of the areas I hunt border on or go thru areas that I cannot use single projectile cartridges = shotgun with at least 8 shot pellets or bow.