I have killed a few hogs as we are run over with them down here in florida . I have used muzzy 100 3 blade heads with brand new blades and they worked well . The only other head I would consider would be a magnus 2 blade that was scary sharp . The sheild is made up of fat but its not your normal fat its like hardened concrete fat and is very hard to cut through . Down here it shows up on boar hogs when they get to about that 150 lb size and when they get bigger than that it just gets thicker and tougher . A side note , I shot a boar last month that went about 200 lbs with my 30/30 he ran at the shot and I herd him crash around 100 yards away , when I went to the spot where he was standing at the time of the shot I found no blood . I followed his prints for 90 yards not one drop of blood
then on a fence post I found some blood and he was laying 10 yards away so the comment about them not bleading through the sheild is correct . It was a perfect shot right through the heart . I' ve seen it happen many times , they can be very difficult to track when they dont bleed . Their vitals are not further back than a deers vitals if anything they are a littel lower .