My LP10 is full size, not compact and goes through hardboard OK at 20yds, it's what we use as backing boards at our range. There's no reason to suspect that a compact will be any less powerful. I thought they were set up at just under 6 foot pounds but I was at Harry Preston's the other week having an LP50 compact set up at just under 6 foot pounds and it seems the LP10's run at 4 foot pounds, or so.
150 shots out of a full size cylinder in my LP10 and 60 out of my compact cylinder through the LP50.
Cheers,
Mick