If your gun patterns them the same or fairly close to the same which would be better for deer hunting out of a 12 gauge. This would be for deer only where a rifle either can't be used or isn't practical nor can slugs.

Now I know most guns pattern one better than the other but saying they pattern them both well which is better? I notice everyone seems to use 00. However, in the past I've used 000 just due to the fact my gun did slightly better with it when patterning. This would be in a 3" magnum shell for both. What's the pro's and cons of each? Or is it purely what your gun shoots best?