[jski]

I have a chance to buy a Colt Defender, that has been ported polished and has had trigger work done. The price is right, buying from a friend that needs cash. I've been told porting on a gun with a 3 inch barrel is not good.The bullet will not expand properly. Any one have one of these? Should I convert the gun back to beening non ported?

 

[dfariswheel]

I'd see how it shoots before changing out the barrel.
Whether a bullet expands is more related to bullet design, so I'd try to test fire a few rounds of your favorite defense ammo into some kind of test media and see what happens.

I'm sure you can alway sell the ported barrel to another shooter if you decide to restore the gun to factory condition.