benEzra
Moderator Emeritus
I'd suggest trying to use realistic wall spacing, as in that test, as much as you can. I've seen some tests in which a dozen sheets of wallboard are stacked an inch apart, and that tends to overestimate penetration because it minimizes the effect of yaw (and bullets have way more drag sideways, both in air and in wallboard).
I would expect that FMJ penetrates more, though; one of the reasons that fragile 55gr JHP/SP tends to penetrate less is that it tends to fragment even in building materials, whereas FMJ (particularly milsurp) tends to be made to shoot through stuff.
I would expect that FMJ penetrates more, though; one of the reasons that fragile 55gr JHP/SP tends to penetrate less is that it tends to fragment even in building materials, whereas FMJ (particularly milsurp) tends to be made to shoot through stuff.