I don't own any hipoints anymore, the name is more of a joke than anything else. They're decent guns though, definitely when price is a consideration. That said, I was trying to get a carbine to take care of deer around here for quite some time ( I own a farm and have depredation permits for the varmints). I tried a hi-point .45 carbine, mainly because .45acp is relatively quiet compared to the power it has, couldn't get good grouping out of it. I was really sad about that, I had looked for a hipoint .45 for a couple of years before I finally got one.
The 9mm seems to group quite well though. I still wouldn't personally take a deer with a 9mm unless it was really close and I hunt them as varmints, not "majestic game". I'm not saying you shouldn't though... I have since quit using a .22 LR for deer (perfectly legal in N.C. to use a .22 LR for deer during season) because of the unacceptable differences in ammo, I've lost 2 deer because of bad .22 ammo, put a bunch in the freezer, but after 2 ran off it just wasn't worth it anymore. Both of these were with some sort of "premium" ammo, but I heard the round kinda go "poompf" instead of a loud "crack" and watched one of the bullets bounce off the deer's skull.
I do however use a .22 magnum while patrolling the farm, with the ammo I have the .22 mag has more power and speed at 100 yards than a .22LR has at the muzzle! Still doesn't mean it's ideal for everyone, and you have to really choose your shots.
I get it though, I really wanted my .45 hipoint carbine to be a deer killing machine, turned out it just wasn't. Deer aren't superbeasts, and it's capable of it, just not great. if you want a light handling, easy to use gun that won't break the bank or kick the snot out of you, try a .30-30. They're pretty darn nifty and can be bought used cheaper than a high point carbine is new...
just my experiences with different things I've heard mentioned in this thread. I've killed a bunch of deer here with my permits, I know how different rounds put meat in the freezer... for me a .22 magnum is great when I'm just patrolling (mainly looking for groundhogs and rabbits, but definitely deer capable), but if I see a deer, or am intending on shooting a deer, I'll grab the .30-30 or the .30-06 everytime. The only exception I have is that I'm legal to spotlight on the farm as well, when I spotlight, I always use the .22 magnum just for noise consideration of the neighbors and the spotlight is really only ideal for ranges that the .22 mag is capable in.