I've been flinging arrows also, for a couple of weeks. 50 lb. Bear Montana. I'm shooting in the back yard every other day or so, start at 5 yards, then 10 yards, 7 1/2 yards, 15 yards, 10 yards again and finally 20 yards, six arrows at each distance. I can squeeze 27 yards out if I go beside the house to the fence; otherwise my furthest shot is 22 yards from right in back of the house. I was pleasantly surprised that, after a winter layoff, I was at least hitting the bag and most of the time within a 9" circle. Consistency isn't there, though so I'm trying to better that.
My target, and this is not something I came up with as I got it from the folks at Tradrag (now gone), is a feed sack I get for 50 cents stuffed with plastic bags, then stapled shut. The aiming spot is a piece of black duct tape. I have this backed with three hay bales and the shed, just in case I miss the bag.
This stops the arrows dead and they are still easy to remove.
~Kees~