Can I get a slug barrrel ported?

Like the first guy said, porting will not solve your cycling problems with the pump. I suspect you are "short stroking" the gun. This is common with hard recoiling pump shotguns. Have someone watch you shoot, preferably someone skilled with a pump shotgun. Or, set up a video and film yourself shooting. Then play it back at about half speed. See if you are moving the pump during recoil.

Porting a shot gun will do nothing . A shot gun is not the same as a rifle. A shot gun shell has a wad a rifle bullet don't. Porting would have to go 6 inches back to eliminate kick and who know what that would do to your velocity. If recoil does not bother you than why even bother wasting the money.

Porting will solve nothing on your cycling issues. If your bolt is opening based on recoil that's a problem/malfunction on your individual gun that needs to be solved (it's actually unsafe for a gun to be unlocking due to firing).

Personally, I'm not a fan of porting anyways. The pain you take off your shoulder just ends up transferred to your ear as porting makes the gun MUCH louder.

this happens to pump guns with the heavier loads. its probably just the rearward momentum on you after firing that is doing it. its a minor issue that doesn't really need fixing. if anything just adjust your stance so you put more pressure forward on the gun and see if it does it less.

Yes you can get your barrel ported.Check with Mag-na- port. For shotguns they call it pro-porting.

good luck