the 73 design has a Bolt not much larger than a pencil, and actually no locking lugs, action depends on 1/4" diameter pins to lockup and headspace, which may or may not be the weakest part, as it also has most of the sides of the action cut out with "windows and thin steel side covers, I have fired many rounds throug originals and repros, never felt safe firing the originals with anything but blackpowder, and the repros wit BP equivalent smokeless loads, never thought the 357 safe, had 1 but only shot 38 spec in it,others may tell you different, but take a look inside, not a lot there!
