pell

"Is this a flat top, or will it handle heavy Colt loads?"
Post 11 talks about two different frame sizes. To avoid confusion, see Post 6 for a photo of a flat top Blackhawk. "Flat top" because the whole of the upper surface of the cylinder frame is ... <wait for it> ... flat.

The model 0470 that you provide a url for in Post 15 is not a flat top ... notice that the upper surface of the cylinder frame @ the sights is raised compared to that surface @ the barrel junction. This raised area constitutes the "sight ears" that many @ this forum refer to when discussing large vs medium frame BHs.

Consensus @ this forum is that a BH with "ears" is a large frame BH capable of handling heavy, "Ruger only" loadings.

"Is the gun in post #11 the same as this one, only with an extra cylinder? "
If by "... the gun in post "11.." you mean the gun pictured in Post 6, then, no, the model 0470 is not the same. As noted above, the Post 6 gun is a flat top (medium frame) and the 0470 gun is a BH with "sight ears", a large frame. Note also, that the gun @ Post 6 has a traditional grip frame while the 0470 gun has a Bisley grip frame.

punkinlobber

If it says "New Model" then it is built on the same frame and cylinder as the Super Black Hawk. If it says "flat top" then it is on the old style 357 magnum frame that was revived for the 50th anniversary and shares the same frame as the new model Vaquero which cannot handle the Ruger only loads.

Quiet 1

Sorry partner, but this is totally inaccurate. I have a "Blackhawk .45 Flat Top Convertible" and it is clearly marked "New Model" and it is built on a "New Vaquero" medium frame.

All Blackhawks, EXCEPT THE FLATTOP MODELS, are built on the large frame and are good to go for "Ruger Only" loads. But, if they are a "Flat Top" "New Model Blackhawk", even though they are marked "New Model" they are built on a medium frame and they are not.!

Caveat emptor folks, on some of what you read on the internet.