I first did a model 30 into a H&R then bought a J frame 431 in 32 H&R, then found an 2nd 32 H&R cylinder on Ebay and got it. The second cylinder I reamed to 327 mag and first stuck it in the 431, then I got an 642 which is an alloy hammerless +P 38, took the barrel off, fitted a 32 barrel and then the 327 cylinder.
The only complaint I have is that shooting the 327 in an alloy J frame it takes longer to get back on target than with the H&R
I am considering putting the 327 cylinder and a barrel on my all stainless 640-1 and convert the 642 back to a 38.
The 32H&R J frames are slight superior to J frame 38 specials in my opinion.