The short answer to your question if a match barrel has better accuracy, it is yes. A match a barrel will be affected quicker by leading, fouling and copper deposits. If you are shooting matches that require you to be pin point, then a match barrel is for you. If you are planning to use your pistol for self defense, the stock barrel is more than accurate enough. I carry my XD45 as my duty weapon and it has a stock barrel. I can shoot 2 1/2" groups at 25 yards. Have fun with your XD.