Learned my lesson in this regard this year, and will henceforth carry more ammo! I figured 7-8 rounds is more than enough, and usually it is, but then sometimes stuff happens...
The 2 farm hand kids who came out to look and give me a hand asked if I didn't have a knife? Well hell yeah I had a knife, and with a bull elk its staying in its sheath until its time to start skinning. I've worked on cattle farms enough to know what I can and can't handle with a domestic animal, and I have no illusions about wrestling a bull elk.