Colt Trooper MkIII with Lyman 358429 358439 length?

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gilgsn

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Hello.

I just ordered a Trooper MkIII and found a Lyman single cavity 358439 HP mold! The buller was meant to be used with 38 cases because of its length. I did read that some revolvers have long enough cylinders to allow the use of 357 cases. Is the MkIII one of them? Or will I have to use 38s or trim 357 cases a bit?

Also if someone has mold handles for sale and would be willing to ship to France, that would be awesome :)

BTW we don't have 2400 or Unique here but the French national powder manufacturer has SP3, which is pretty much equivalent to 2400, and Ba9, very close to Unique...

I am very much looking forward to load for and shoot the Trooper, though parts breakage worries me a bit, especially the firing pin, even if it isn't that common... I have a Chrony so I'll publish my results with those powders, though that probably would only be of interest to French shooters.

Happy new year!

Gil.
 
Congrats on your purchase. I have a Colt Trooper V and it has the smoothest of triggers. I don't shoot it much because it appears somewhat collectible and I have a lot other .357's. Also, it is nickel and doesn't clean up as easily as stainless. I also assume that the metal polish that I use to remove the powder marks from the front of the cylinder will be bad for the finish with repeated use.

Enjoy your new gun!
 
Congratulations on your Trooper. It's a sturdy revolver that should last a couple of lifetimes. It is recommended that if you not dry fire without snap caps because of possible firing pin damage. Otherwise it's extremely durable. Sorry I don't know the answer to your question regarding the Lyman bullet.
 
Use the 357 cases. Don't trim. Seat in the crimp groove. The Trooper has a short cylinder. If the round is too long with the bullet seated in the crimp groove then seat just deep enough to clear the cylinder end. Apply a roll crimp that bites into the bullet. This should be close enough to the recommended OAL that you will not have to worry about the powder charge, unless you are loading near the maximum pressure. If you are, start 5% low and work up.
 
Thanks guys. It looks like it might work from the castboolits thread. I would rather not crimp on the driving band, but I can always use 38 cases...

Gil.
 
Hello.

I just ordered a Trooper MkIII and found a Lyman single cavity 358439 HP mold! The buller was meant to be used with 38 cases because of its length. I did read that some revolvers have long enough cylinders to allow the use of 357 cases. Is the MkIII one of them? Or will I have to use 38s or trim 357 cases a bit?

Also if someone has mold handles for sale and would be willing to ship to France, that would be awesome :)

BTW we don't have 2400 or Unique here but the French national powder manufacturer has SP3, which is pretty much equivalent to 2400, and Ba9, very close to Unique...

I am very much looking forward to load for and shoot the Trooper, though parts breakage worries me a bit, especially the firing pin, even if it isn't that common... I have a Chrony so I'll publish my results with those powders, though that probably would only be of interest to French shooters.

Happy new year!

Gil.
 
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