the only logical reason i can see for going with a shorter barrel is to save weight. but the weight difference between 22 and 24 inches is only gonna be at the most a 2 oz difference. Id go with the 24 inch barrel, 2 oz more isnt gonna break your back hiking through the woods any increase in velocity is always a plus even if its just a couple feet per second also from my experience longer barrels tend to be more generous in the accuracy department.