MP 340 .357 and 642 J frame with heavy loads

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I love the 296 and its perfect for my coat but for pants pocket carry I am going to go with a M&P 340 or J frame 642-2.

Will any .38 hot loads cause crimp jump in the air weight 642-2?
DoubleTap Ammunition


Will any hot heavy .357 magnum loads cause crimp jump in the 340? I have very strong wrists and in a SD situation recoil is not an issue. I was thinking of loading heavy gold dot 158 grain hollow points for the first five and the 200 grain Double Tap as the last round or all Double tap 200 grains.
DoubleTap Ammunition

Have there been any crimp jump or firearms damage to the titanium/ scandium j frames? I know recoil is going to be horrible but I only have 5 shots so I want them to count. I dont want to damage my gun or risk blowing it up.

These would be my back up gun. In this case I want the deepest penetrating round possible for penetration through common barriers and a large attacking dogs skull. Over penetration is not an issue and neither is recoil. I spend alot of time in the woods.

I use gold dots for my primary load in my autos. I dont know much about non hollow point rounds. Which will penetrate the deepest and create the best wound channel? I was told wad cutter flat tips in a revolver are the best for penetration and damage.

 

[photoman]

Will any .38 hot loads cause crimp jump in the air weight 642-2?

I've never had any problem with that shooting full power heavy loads in a 642. I would think either a SWC or WFN would be your best bullet design for field use. I would consider the Buffalo Bore 150gr hardcast wadcutter a good option too. Any of those 150-158gr bullets going 800-850 fps is going to do some good work in the field. They're also going to do some good work on your hand if using a 642!

 

[P&R Fan]

I have a M340PD, which is just a bit lighter than the M340M&P due to a titanium rather than steel cylinder. I've never had bullets jump the crimp and have shot some very hot 158 Grn. loads in it as well as my carry load of Federal 125 Grn. SJHP.
If you're worried, test it. Load 5 rounds and then fire 4 and inspect the last round. Compare it to other loaded rounds. I'd do that twice with the same round just to be sure. Just make sure you don't use bullets lighter than 12o Grn, as they can damage the revolver.

 

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Just make sure you don't use bullets lighter than 12o Grn, as they can damage the revolver.

How do you come by this information?

 

[P&R Fan]

Actually there have been several posts on here about it. To be honest with you I really don't fully understand what happens, but I'm sure somebody will explain.

 

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I'm sure somebody will explain.

I'm interested.