Hey guys. Nothing like placing an order for a barrel then later checking to see if the length is "ok" for my use. Its a Criterion 308 10 twist at 24". I plan to use 150's up to 178's maybe and really like the 168 A Max out of old barrel. I mainly shoot from 1-300 yds but do plan to try F Class this year so that will stretch it out. Is 24" w/ a brake ok for my use? Is there a site or program that depicts best barrel lengths? Thanks in advance.