Both of my 308s - a Browning Lever Action and a Remington Model 7- have 20” barrels. Not crazy muzzle blast but definitely a little more than some other 308s out there. I’ve heard that shorter barrels are stiffer and tent to be more accurate but so much depends on the rifle and round itself that I’ve never seen much of a difference. I’d recommend the 22”, out of a short action round I don’t think you’ll gain a lot with a longer barrel except some hassle when walking through the bush.
