How much does it puff up ? Can this be poured into one of those " You stuff it" type targets to fill it with foam ?
Chuck this stuff expands and push's itself against the wall of the hole you dig for posts and expands to the top very quickly !
What I witnessed is if a hole is 24 to 30" deep and you pour the entire bag in it will expand to top in several minutes and extra just overflows and sort of "MUSHROOMS" out.
It is made for setting posts,mailbox's and whatever you would need concrete to hold but best thing is no water needed and no tools to mix it.
I am just throwing this out there for folks to try it "BUT" I have never used what I have yet on any target.
As mentioned can it be used in a blob target ? I would guess yes but I have not tried it.
I would think if someone poured a little into the holes and let it expand to the point of overflowing then just use a serrated bread knife to follow contour of target they could save their target ?
Some can be found in the major hardware stores in the cement isle but best check your local area because not all carry it.
If you have three 3 D targets that are shot up then I think one bag will do all three if you use it sparingly and not go crazy with it.
Worth a try is all I'm saying !