Pick this up awhile back on impulse ( $100 ) and would like a little more info if you could. Lock up good and seems to be in time. I think it is a 4th model top break 38 S&W. Would it be safe with modern ammo, no reloads or it is just a black powder load only? Has a 5 inch barrel and was told target grips, one panel missing a piece. Would say it has about 20% blue with the rest gone patina. The bore looks real nice. Any help would be appreciated.