Agree with everyone above... don't get it ported. If you want to eliminate 65% of the recoil, get a removable muzzle brake with thread protector. Some of the newer brakes are more efficient (holland side discharge type, etc), but must be timed/aligned properly, and many gunsmiths don't do a good job with this.
Expect to pay $125-150 for the threading with protector, and another $50-$80 for the brake itself.