This one is 23 1/2 inside, 5 1/2 year old deer. Even in the semi sneek with the ears pinned back it doesn't look that wide. Like Robin said, young deer probably 2 1/2, no where near 20".
Shoot, all I got is one of them 12 Gage pumpers a 3 ought 06 bolt action and for funnin a semi automatic 22 with a 10 shot clip.
Why would you need anymore?