Threat test - VISM Polyethylene Ballistic Plate

I tested a 10x12 plate at 15 yards, shot it in order, with two Winchester M855, two Winchester .45 230 grain FMJ, and one Federal 12 guage 2 3/4 inch #4 buckshot. The M855 was used in a PSA PA15 with a 16in barrel 1 in 7 twist, it passed through, but only the mild steal core, the jacket and lead was caught by the plate; there was maybe 1/5 an inch of back face defamation. The .45 was used in a S&W M&P 2.0 full size and was stopped on the first layer with no back face defamation. The 12 guage was used in a Remington 870 20 inch barrel and was stopped on the first layer with no back face defamation.