I'm not sure what you mean. We can use up to #4 buckshot for deer. Most people I know shoot 00 or #1. I like copper coated #1 in a 12 gauge 3 1/2 inch. I believe there is something like 24 pellets in that shell and copper coated seem to group much better for me at 40-50 yds(that is about my max range withmy shotgun). I have been very impressed with the stopping power of this set-up.
That's what the law is in WV too. I got the impression that you were talking about using something smaller........[
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I do not mean to sound like I am hollier than thou. I am not. Shooting at a running deer is just something I would not do. If you are comfortable and responsible with it Ok.
I just see too many opportunities for a bad ending.