The difference between a dent and a bulge is vast. Most dents are easily raised and unless extreme in size or have a sharp crease in the metal not be a problem. A bulge is a stretching of the metal in the exact opposite direction and the one which all the stress is being exerted when the pressure builds. Think of it as an aneurysm of the barrel vs a slight collaspe. I will take the slight collaspe as the repair and result are much more predictable.

If you still want the gun buy a set of Briley tubes for $300.00 and shoot it in small gauges.