Idiots on the internet
I noted an idiot on eBay was trying to sell a 45 Colt cylinder for a Blackhawk and said it will also fit 45 acp with moon clips?!?!?
Idiots on the internet
by Cherokee 
, Medina, Ohio, Monday, March 31, 2014, 07:28 (3896 days ago) @ stonewalrus
Hopefully buyers will know better, but someone will believe him.....
Fortunately he hasn't had any takers YET
Nm
Well I hate to break it to you but….
A Blackhawk 45 colt cylinder will accept a moon clip full of 45 Acp. 
I used to use moon clips all the time reaming the cylinders, I'd inset a moon clip full of empties when I'd hone them after reaming to protect the headspacing/shoulder. (on the Acp cylinders that is)
Never installed one in a gun though to see if there was enough ratchet past the clip to still function. 
I figured you could do that but don't know how that is going
To work with a single action.
I have long wanted to build a Sedgley-style single
action with a lift-out cylinder on a Beretta Stampede that would work with 45acp moon clips.
That way I might be able to keep up with Jim Taylor on unloading a single action. 
"don't know how that is going to work with a single action"
Slowly.
The OM Blackhawk 45 Colt does not have the room to
by Cherokee , Medina, Ohio, Tuesday, April 01, 2014, 08:08 (3895 days ago) @ stonewalrus
reinsert the cylinder filled with 45 ACP in moon clips. NM Blackhawks, I don't own any, could be different I guess but I doubt it.