I use a Moral bag target...the big one. I shoot just about every day and can easily get a year out of one, two if I replace the cover.
Once I had 3 or 4 of these worn out moral targets I made a 4'x4' frame about a foot and a half thick, put a canvas cover on each side and filled with my old target stuffing. I use this target for blank bailing and when the kids want to shoot. Been using this target for a couple of years and never had a pass through, although I did add a piece of carpet on the back side.