barnbwt
member
- Joined
- Aug 14, 2011
- Messages
- 7,340
Hello, once again!
I'm working on a .357magnum pistol platform design, and I'm having some trouble figuring out what to use (as a starting point) for my barrel dimensions. Running the figures, less than 1/10th of an inch is actually necessary to contain .357 pressures (see the chamber web thickness of an 8-shot 327 if you don't believe me), but actual barrel thicknesses are much greater. I assume the barrel thickness is mostly defined by bending/buckling stress, raising harmonic frequencies, reducing barrel-whip, and providing a big enough interface with the frame. For some reason, there is a dearth of these details online, as far as I can tell.
My only () .357 is a TRR8 with a gigantic aluminum shroud, so I can't really take numbers from it with calipers. Would some of you find gents mind posting up the outside diameter of some (your?) magnums? If possible, I'd like to use an existing barrel and cylinder (the most "failure critical" items in a revolver, I will leave them to more qualified designers) of a common maker for my prototype (not building it, yet, Mr. BATFE, just thinking ahead...).
I am most interested in the usual suspects' "pencil-barrel" diameters;
S&W N-frames (and maybe L-frames)
Ruger Blackhawk (new or old)
Ruger Redhawk (I will assume >>Blackhawk diameter)
Taurus Large-frame (sorry, I don't know my Tauri models well. Their barrels are fine, even if some find the actions questionable)
Colt .357's (sorry, I'm not up on my Colt model names, either)
For extra credit (), I could also use the cylinder outside diameter and outer wall thicknesses. For now, though, I'm basing my design around the TRR8 cylinder. So long as my frame design is stronger than the cylinder/barrel allowables, it shouldn't fail first.
I've not looked into it much, because it's more complicated, but I might try to implement a Dan Wesson-style shroud attachment, or even a S&W two-piece barrel setup. Anyone know how thick those (thinner) barrels are?
And finally, aw, what the heck...What's your favorite method for attaching a barrel to a revolver, and why? DW, crush-thread, thread-shimmed, pressed/pinned, tensioned, welded eek or other?
TCB
**I guess I'll assume .750" outside diameter, for now; I've seen at least a couple Ruger blanks going for that. I would much rather base the design around and off-the-rack replacement barrel, though.
I'm working on a .357magnum pistol platform design, and I'm having some trouble figuring out what to use (as a starting point) for my barrel dimensions. Running the figures, less than 1/10th of an inch is actually necessary to contain .357 pressures (see the chamber web thickness of an 8-shot 327 if you don't believe me), but actual barrel thicknesses are much greater. I assume the barrel thickness is mostly defined by bending/buckling stress, raising harmonic frequencies, reducing barrel-whip, and providing a big enough interface with the frame. For some reason, there is a dearth of these details online, as far as I can tell.
My only () .357 is a TRR8 with a gigantic aluminum shroud, so I can't really take numbers from it with calipers. Would some of you find gents mind posting up the outside diameter of some (your?) magnums? If possible, I'd like to use an existing barrel and cylinder (the most "failure critical" items in a revolver, I will leave them to more qualified designers) of a common maker for my prototype (not building it, yet, Mr. BATFE, just thinking ahead...).
I am most interested in the usual suspects' "pencil-barrel" diameters;
S&W N-frames (and maybe L-frames)
Ruger Blackhawk (new or old)
Ruger Redhawk (I will assume >>Blackhawk diameter)
Taurus Large-frame (sorry, I don't know my Tauri models well. Their barrels are fine, even if some find the actions questionable)
Colt .357's (sorry, I'm not up on my Colt model names, either)
For extra credit (), I could also use the cylinder outside diameter and outer wall thicknesses. For now, though, I'm basing my design around the TRR8 cylinder. So long as my frame design is stronger than the cylinder/barrel allowables, it shouldn't fail first.
I've not looked into it much, because it's more complicated, but I might try to implement a Dan Wesson-style shroud attachment, or even a S&W two-piece barrel setup. Anyone know how thick those (thinner) barrels are?
And finally, aw, what the heck...What's your favorite method for attaching a barrel to a revolver, and why? DW, crush-thread, thread-shimmed, pressed/pinned, tensioned, welded eek or other?
TCB
**I guess I'll assume .750" outside diameter, for now; I've seen at least a couple Ruger blanks going for that. I would much rather base the design around and off-the-rack replacement barrel, though.
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