if you wanna shoot prone youd most likely need something smaller than 13" i have the 13-23" model on my groundhog gun. certain situations i can shoot prone. but i do most my shooting from the sitting position..thats why i bought it. when i shoot prone i usually fold it up if its too high and support it with a coat or something i have handy...usually shoot prone passed 300yds...just more steadier...the bipod is very steady...but passed 300yds i rather be prone...but i have killed a few chucks at 300-350 sitting...and countless closer in from the bipod