Canadian_extreme I highly recomend to use a fix blade broadhead. The muzzy is an excellent choice. I have killed elk with both fixed and expandables. In my home state of Idaho they (mechanicals) are illegal. Elk are very tough animals and have a very thick hide so I like a dependable fix blade broadhead. Mechanicals will open just fine, that problem has been long solved, but they just aren't quite as strong. If a big bull has been wallowing and had 1/2" of mud on him and you also hit a front leg, shoulder bone, or even a rib bone. Well that can be a lot to ask of your broad head and I want a broadhead that can penatrate all that and still blow through tha vitals and out the other side. Giving me two holes to bleed through for a blood trail and a quick death. Also I like the heavy arrows to get this job done. When I do my part and everything is perfect and a bull is standing under 20 yards or so and broadside. The last thing I want or need to worry about is will my arrow and broadhead do its job. Just my 2 cents hope it helps.