I've had a couple of DA 32-20s (M&Ps) over the years, one now, but both were sort of marginal in condition and of course lacked adjustable sights. I'm leaning toward adding that cylinder to my Project 616 so I can "have it all" in a Smith DA revolver. That would certainly give me a lot of the same kind of flexibility you have with your BH, but I can see good arguments to go with the modern SA like yours.
It's a shame that I can't make a 32-20 cylinder for the 327 eight shooter, no room for eight of the larger base diameter and a six shot cylinder wouldn't work well with the eight shooter hand. I'd probably be willing to give up the two extra shots on the one to get two different cartridges though!
I need to get with friend Hondo44 on a Ruger venue and talk about possibilities of some sort of dual cylinder SA... I visualize a stainless flat top with 327 and 32-20 cylinders and that classic deep set Micro style sight. I could probably be the only kid on my block to have one of those if I built it!
Froggie
Froggie,
Hands have quite a bit tolerance. I put an eight shot 22 cyl in my son's K22 and the original 6 shot hand worked fine. If you have to fit a hand, you can reach a happy medium fit that works well with both cyls when going up or down one extra shot or two.
My 6 shot hand in a 586 worked perfectly when I converted to a 5 shot 44 cyl.
In a Ruger 327 8 shot, you can drop down to a 6 shot 32-20 cyl with the 8 shot hand and if it over-travels with the 327 cyl, just shorten the bottom tooth of a six shot Blackhawk hand a slight amount.
A 7 shot 32-20 cyl is a problem; there is no 7 hole cyl made by Ruger to ream to 32-20. It would have to be custom made (read that expensive). However a 6 shot .30 carbine cyl is the way to go.
Ruger's NM .30 Carbine Blackhawk will shoot off the shelf .32-20, no re-chambering needed. If you reload, you can even reload 32-20 in .30 Carbine dies and the case necks will not be worked as much. Use a .32-20 shell holder. There's a difference in bullet diameters, .312" vs. .308" but they shoot with fine accuracy.
The .312" bullets may tend to raise pressure slightly in the smaller .308" barrel diameter although of no consequence in the robust Ruger cyl and way under its max pressure limits. And you may have some leading with lead bullets depending on hardness.
So if you reload you can use .308 bullets in your 32-20s.
Even though the .30 Carbine is a rimless round it's a good thing the NM lets the .30 case head stick out more than just the rim thickness since the .32-20 rim is .016" thicker. But may bind slightly in some revolvers and the rear cyl face just needs a slight facing off.
.32-20 cannot be fired in OM Ruger .30 Carbine cyls as is. The chambers seat the .30 carbine rim flush, so the rimmed 32-20 case head won't fit in the end of the .30 chamber. A simple recess cut in the chambers to the .061" thickness of the .32-20 rim is needed in the OM chambers or facing off the rear of the cylinder .061", will fix that.
But you won't find a stainless cyl. in .30 carbine; I don't believe they were ever made in SS. But you may find an aftermarket stainless cyl with 6 pilot holes drilled that can be reamed to .32-20.