50 pounds is plenty. I put an arrow out of a 50 pounder completely through a deer longways once, and it still impacted the ground with force.
Get good with your bow first, you can always move to a heavier bow later if you feel the need.
Wheel bows vs cam bows.
Cam bows have more let off, a lot more in some cases. They often have more fps on launch. But, many are not as smooth on release as acceleration is more violent.
Wheel bows are smoother , I am way more accurate with a wheel bow. Let off is usually 50%, that is it. To...
First deer I killed was with a 45 pound bow. Was a thru and thru shot, longway through the deer.
If you can put a sharp broadhead through the ribs with a 30 pounder, it will do the job.
If you are new to archery, start with a bow set to about 50 pounds, but can be adjusted up to 60 pounds. 50 is plenty of power to put an arrow through a deer long ways, a heart/lung shot is always a thru and thru.
At 50 pounds, you can practice more and get consistent, just like a firearm...
When I switched from aluminum to carbon arrows, I had to re-tune my bow. I went with a relatively stiffer shaft, and about a 2" longer shaft than the aluminums I was using.
There was a reason I went longer, but I can't remember why.
The carbons are more accurate, have higher speed, and are...