Tennessee Jed said:
Is there any speculation as to whether this new 66 can handle a steady diet of magnum ammo, specifically, 125 grain JHPs at around 1400 fps? If so, I would be very interested in the new model. Seems as though the 2-piece barrel might resolve the forcing cone issue the old k-frames had with blaster level ammo, but I'm not sure.
mordis said:
I wonder if they dealt with the weakness of the platform with regards to .357 magnum light weight high velocity loads.
The short answer is
Yes.
The problem with the K-Frame was the necessary "flat spot" at the bottom of the barrel. This flat cut allowed clearance for the cylinder yoke to clear the bottom of the forcing cone.
I couldn't get my camera working to take a photo so I glommed a comparison photo off the web that is "close enough" for our purposes.
In the photo below, the right frame shows the flat-cut on the bottom of the K-Frame barrel. This is the location of almost every forcing cone/frame failure on these guns. The left frame of the photo shows the improved "L" frame which has sufficient clearance and does not need a flat cut on the barrel. On my 2004 M66-7, S&W also angled the cut for the yoke itself as shown with the L-Frame. Notice that the L-Frame cut angles down from left-to-right while the K-Frame's yoke cut is just about flat and level.
The two-piece barrel uses a thinner barrel tube and a slightly beefed up frame area to provide the necessary clearance. The barrel is screwed into the frame and covered with a barrel shroud to give it the S&W profile. A torsion nut, installed with a special tool at the muzzle end, doubles as a cap at the end of the barrel.
Due to the installation of the frame-mounted firing pin there is also a bit more "meat" of frame between the recoil shield and the top of the hammer cut out. This can be observed as a different (lower) angle to the hammer cut-out on the frame. This should provide added strength to the frame as well.
If S&W has added a ball-detent lockup to the gun as I've heard, then it could be termed as a
New Century Triple-Lock if it retains the locking mechanism at the front of the ejector rod too. That would make it a very strong locking system.
Regards,