I looks like it might go to 20 inches,the string angle seems ok,,
, I have found with a 20 inch power stroke 150 fps with a 10 gpp arrow is achievable,, that would give you a 500 grain arrow at about 150 fps,, that is definitely a deadly weapon,, for deer, and in my opinion with a heavier arrow ,, elk close range,,,, I love the shorter Native style bows, and feel there is a very good reason they made so many bow types that are short by todays standards,,.congrats on your bow,,