i usually use a old gerber fixed blade but my dad did his field dressing with a small schrade 3 bladed stockmans knife and did it in roughly half the time it takes me lol, he had done it a few times for sure, and he kept the thing really sharp, i never saw him use a fixed blade for the job FWIW.
the 1st time me and my wife went hunting with him we shot a couple of rabbits, he would take the same knife and slit the rabbits bellys open, grab the ears and snap the rabbit like a whip and inertia would empty out the guts lol, never ever saw anyone else do that, and neither had my wife, it was her 1st hunt and she started turning green, then a big old farm dog ran up and started eating the guts, but bless her heart she didnt barf, said i had better have been glad she was in "hunting" mode though, she was something else lol.
my dad said when he was growing up (depression) they ate a lotta rabbits and he just figured it out as an easier way to deal with the gutting, didnt get his hands as dirty.