The Black hawk is very strong, but the damage I was seeing from shooting 325 and 310 grain slugs was to the base pin.
So, If I were to do so again, I would use one of the pins you show and NOT one with an Allen set screw.
Hate Allen screws! Until you get to the larger sizes they strip out with almost zero pressure.
A torks (SP?) headed screw might be a good answer.
But, like I said, the REDHAWK is one strong gun and mine takes the 310gr. loads in stride.
Like Blackhawks, but like Redhawks better.
Keep em coming!
Crusty Deary Ol'Coot