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Korth Inspired Supermag
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rwsem
SOWELA (Southwest Louisiana)

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March 9, 2024 - 10:00 am
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I rekindled an old project recently.  It all started with Bruce gifting me a bunch of 414 ET Gates brass many moons ago.  As most of you know I only have Monson era revolvers, so the 414 SM caliber never really fit in (other than the two known prototypes), and I sold the AGS to a member to fund a rifle build. So, there I was: a bunch of brass, a long-ago sourced cylinder, an extra 740 (hoarder, I know), an extra 10" 41 mag barrel (again, I know) and a desire to build firearms (and some skill but not a lot). I measured the .410 barrel and determined there was enough meat to be able to cut, cone, and re-thread to fit the model 740 frame.  I spent a few hours fitting the cylinder to the frame (and frame to the cylinder) and then a few more getting the bolt and hand to time correctly on both cylinders. Monday, the cylinder and barrel go to an applicator for a black cerakote finish, so there will be no mixing a 414 cylinder with a .357 barrel installed.  And of course, there's the finishing touches that I'll add during final assembly.

DW-lock-up-completed.jpgImage Enlarger

 

Technically, the glass is always full; half liquid, half air....

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605Dart
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March 9, 2024 - 12:14 pm
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SCORPIO
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March 9, 2024 - 8:36 pm
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Anything worth doing is worth doing well.

My father

If a man designed it, and a man built it, then a man can fix it.

My grandfather

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KurtB
Pleasant Plains, Illinois
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March 11, 2024 - 11:17 am
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Charger Fan
Northern Utah

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March 13, 2024 - 9:59 pm
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I like this build idea! You are going to have the best of both worlds when you're finished, looking forward to following along on this one. cool

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rwsem
SOWELA (Southwest Louisiana)

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March 29, 2024 - 12:30 pm
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Finished the Frankenwesson .357/414 Supermag.

To ensure I had the timing correct, I thought I'd load a squib round with no powder, only a magnum primer.  To my surprise, I didn't even hear the primer go off, so I kept trying to fire it two more times.  I thought the primer was bad, but it wasn't as evident by the soot on the bottom of the bullet. Seems with the volume of air in the case and the bullet seated, you don't hear the primer pop...

IMG_4105.jpgImage Enlarger

IMG_4107.jpgImage Enlarger

Soo... I downloaded to 3gr, 1gr, and 0.5 gr. of Lil Gun, packed in place with a bit of cotton.  Don't do that unless you're confident in your reloading abilities, you can detonate the cartridge!  Anyway, I used 3 gr to start and caught it in some wadded up t-shirts.  Then, for fun, I wanted to see how low I could go until I got a bullet stuck in the barrel.  .05 drove the bullet about 2 inches into the barrel, in case you wanted to know.

IMG_4111.jpgImage Enlarger

Now, I think I'm going to run an accuracy test; no forcing cone vs forcing cone.  My reamer is delayed, so while I'm waiting- why not?

IMG_4114.jpgImage Enlarger

Technically, the glass is always full; half liquid, half air....

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Stinger
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KurtB
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March 30, 2024 - 9:42 am
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I’m surprised at how low of an amount of gun powder you could go to encounter a squib situation.  .05 gr is really low!

Very cool project.

IMG_3745-1.jpeg

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superdan
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Charger Fan
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March 31, 2024 - 8:41 pm
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SCORPIO
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March 31, 2024 - 8:45 pm
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Interesting info Ron.

Looking forward to that accuracy report.

Anything worth doing is worth doing well.

My father

If a man designed it, and a man built it, then a man can fix it.

My grandfather

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rwsem
SOWELA (Southwest Louisiana)

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April 1, 2024 - 4:52 am
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Charger Fan said
Ya know...trying to get a squib is just not normal. screwy big-grin

  

Worse than that- I was actually trying to get the cylinder to lock up with the bullet only halfway in the barrel.  Maybe I'll try again....

Technically, the glass is always full; half liquid, half air....

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Charger Fan
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April 2, 2024 - 1:14 am
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rwsem said

Charger Fan said

Ya know...trying to get a squib is just not normal. screwy big-grin

  

Worse than that- I was actually trying to get the cylinder to lock up with the bullet only halfway in the barrel.  Maybe I'll try again....

  

LOL! laughing 

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