if its like the hhb here,they dont get real large in diameter
get 6-8" or bigger if you can
the bark will come off easier if cut in spring/summer versus winter like now
check the bark pattern very carefulley as hhb likes to grow twisted
also when splittign it will want to twist even if the bark looks straight
once you remove the bark,thats the back for your bow
you can try and chase a ring if you want,but they are usually very fine and hard to differentiate from one another