605 is a great gun
I had the same lockup problem with mine, but only shooting certain ammo, and after lots of it. It even states in the manual that some types of ammo can bind up against the breach, and to open the cylinder, and inspect the ammo, then reload with fresh cartridges. I don't know if it's a brazilian thing or what, but I noticed some cartridges fit tighter than others. The magtech ammo is made in brazil, and seems to "fit" better in the gun. I wonder if the gun and ammo are designed for each other. I've only had the problem a couple of times, and never in the first 50 rounds. Having said all that, I think the gun is great. It's my first handgun, and my wife and 12 yr old son can both shoot it with 38spl loads. I'm currently using a magtech 158gn semi jacketed soft point at 800fps. The kick is manageable, the round is very accurate, and I feel it will penetrate, and along with it's flat nose cause a decent sized wound channel. I'm going to try some of their semi wadcutters as well, but they are not jacketed and I'm reluctant to lead up my barrel. We'll see. I have the stainless model, and paid $311 out the door. It sounds like you found one at a good price. I put the combat grips on it, but I may put the boot grip back on when I get my carry permit. I trust it to be completely reliable. It's in my nightstand.
Jkwas