IMHO you don't need a ported barrel on the Marlin .444 - mine did not have enough recoil to bother with. However, I have shot a lot of IHMSA competition and some of those pistols generated a lot of blast. My suggestion is to always wear both ear plugs and muffs. There are times when I go home after firing big bore rifles with a mild headache from the concussion of muzzle blast and recoil. Even with all this protection I lost 40% of my hearing while working at a government firing range. My hearing aids cost $6,000 a pair, paid for by Worker's Compensation, and do nothing for the constant ringing in my ears that will never go away. Don't take any chances. I wear plugs even when varmint hunting. Remember when the ringing in your ears stops, if it does,those nerves are dead.