12 ga. vs. 20 ga.

[Double Drops]

I've narrowed my choices of slug guns down to an H&R Ultra Slug Hunter. I can't decide whether to go with a 12 gauge or a 20 gauge. I'll will be using this only for deer hunting. Is one more accurate than the other? Will I run the risk of losing a deer because of less knock-down power with the 20 gauge, or does it have plenty?

[telkev]

The 20 gauge has plenty of power, but there are more slug choices for the 12 gauge to choose from.