buckmaster2000. when i pattern for duck loads i usually draw a mallard size duck centered in the 30" circle. make sure it is lifesize. then i can pattern at longer distances and can get an idea for the size of the deer. i have even tried this with a cardboard cutout for bow target practice since most targets are not really lifesize. you can check with some sportinggoods stores as well. i used to by the patterning targets with the duck already on it. i quit doing that because they on had the duck picture as a frontal view landing. give it a try, it does really help.