Pack Rat, My findings are consistent w/ yours. Which translates to 250lbs of field dressing w/ the 420. Now on my 110 w/ S30V blade I've measured about eight deer or 1500-1600lbs. cut up or field dressed meat.It also depends on the age of the animal and other factors. But I don't lap I just sharpen on a fine diamond stone leaving a more micro-serrated edge. Also, while using most good steels during field dressing I take a cloth wet it and during the process of cutting meat just wipe the blade off. ie. specifically the cutting edge. Which brings back its sharpness allowing me to keep going.Hence, I've determined the culprit of an edge "feeling" dull is the cutting teeth are merely clogged/filled up w/ meat. Once this is cleaned out the edge is restored allowing for longer use. I can do this 3-4 times regaining life each time. But once this does'nt seem to work its time to sharpen. So, try it and see if you notice a difference. DM