Farthest was a runnin yote at a lasered 430 yards. Had quite a few foxes and yotes at 300-400 yards. Most of my predators are in open, flat farm ground and shots less than 200 yards are rare.
As stated, barrel length had nothing to do with it but FYI that was a 22". I much prefer barrel lengths of 20" or less on my GP hunting guns. Chose 18.5" for my homebrew Savage .243.
Like also stated, 30-50fps per inch will work for calculations.