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Thread: 460 cases for 45 Colt shot loads

  1. #1
    Boolit Master
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    460 cases for 45 Colt shot loads

    I have some 460 S&W cases coming to make some 45 Colt shotshells. I have a question about the sizing down process to get the brass to fit into the chamber throats. These will be shot in a Uberti SA. From the way the sized cast bullets push through the throats, they measure approximately .453. The most popular dies are the 44 Special/44 Magnum. I measured the neck wall thickness of a couple .44 cases, and they measured .012. So, if you take the .430 bullet diameter + .012 + .012 for the two neck thicknesses, that adds up to .454 diameter.
    According to the book specs, the neck of the .44 case is .456. So, my question is, is the necked down 460 case going to be a little bit of a force fit into the the .45 throats. Or, does the .44 sizer die neck the case down a little smaller than the books .456 measurements? I haven't gotten my .44 dies yet, so I have no way of knowing. Any help is greatly appreciated.
    If a 41 won't stop it, I wouldn't bet my life on a 44.

  2. #2
    Boolit Master
    CastingFool's Avatar
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    I resized a 44 mag case with my rcbs carbide sizer, and the case measured about .451-.452.

  3. #3
    Boolit Master RKJ's Avatar
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    I took some 454 cases I had and resized them with 45 Colt dies for the same purpose. I didn't check the sizing but they slide in and out of my 25-7 just fine.

  4. #4
    Boolit Grand Master Outpost75's Avatar
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    I just shoot .44-40 shot in my .45 Colts.

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  5. #5
    Boolit Buddy memtb's Avatar
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    I’m using 444 Marlin Mag cases in my 460, and have similar issue. I merely ran the 444 case partially into a 44 mag sizing die. Essentially it looks a little like a bottle-neck rifle case. You don’t have to go very far....just enough to clear throat! I can’t back my 44 mag dies far enough, so I have to short-stroke the lever.Though I haven’t done it yet, I will make a spacer-block to stop the handle stroke at the proper point.....so all bottle-necks are identical! memtb
    You should not use a rifle that will kill an animal when everything goes right; you should use one that will do the job when everything goes wrong." -Bob Hagel

  6. #6
    Boolit Master
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    Thanks fellas, that looks promising. Now I just need to get my .44 dies.
    Much obliged.
    If a 41 won't stop it, I wouldn't bet my life on a 44.

  7. #7
    Boolit Master
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    One other question. Is it necessary to drill the flash holes a little larger in the 460 cases, to keep the primers from backing out when fired and binding up the cylinder?
    If a 41 won't stop it, I wouldn't bet my life on a 44.

  8. #8
    Boolit Master dougader's Avatar
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    I have partially sized the top end of 454 cases with 44 mag dies to use as longer shot shells in my Montado, which has a shorter cylinder than the large frame guns.

    A couple things: (1) My 454 brass was brittle and I needed to temper the mouths or they tended to split. (2) Take care to center the brass well or it can get wonky and size on one side instead of equally all the way around.

    I did not need to drill out the flash holes in 454, but they took small pistol primers fine.

  9. #9
    Boolit Master
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    Dougader, thank you for the tips.
    If a 41 won't stop it, I wouldn't bet my life on a 44.

  10. #10
    Boolit Master RKJ's Avatar
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    I didn’t put this in my 1st post, I used hot glue to seal the brass when they were loaded..

  11. #11
    Boolit Buddy memtb's Avatar
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    In my case (no pun intended) I used 2 1/2” shot shell load data....so there was sufficient pressure (while low in my handgun) to keep the primers happy. I suspect that, provided you do not load down dramatically) primer “back-out” shouldn’t be an issue! JMO memtb
    You should not use a rifle that will kill an animal when everything goes right; you should use one that will do the job when everything goes wrong." -Bob Hagel

  12. #12
    Boolit Buddy memtb's Avatar
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    I did the same......actually, my wife did the sealing! I used an inverted 44 gas check over the shot, lightly crimped.....then the hot glue to seal! memtb
    You should not use a rifle that will kill an animal when everything goes right; you should use one that will do the job when everything goes wrong." -Bob Hagel

  13. #13
    Boolit Master
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    Thanks fellas. Very appreciative of all your experienced knowledge on the subject. I have 44 dies coming from JonB.
    If a 41 won't stop it, I wouldn't bet my life on a 44.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check