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Thread: 460 cases for 45 Colt shot loads

  1. #21
    Boolit Master
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    No sir, haven't tried that yet. Have you had any expierience with doing that?
    If a 41 won't stop it, I wouldn't bet my life on a 44.

  2. #22
    Boolit Buddy memtb's Avatar
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    littlejack, The lighter loads may be the cause for your primer “back-out” issue. Insufficient pressure to drive the case back against the firing shield, thereby allowing the primer to slightly back out.

    When shooting “ light-load wax bullets” (primer was the only charge) this was an issue that shooters addressed by opening-up the flash hole! 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

  3. #23
    Boolit Buddy
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    This is an informative thread. I'm currently working on a project using a Bond Arms Rowdy 2-shot Derringer 45/410 with 3.5" & 4.5" barrels that were modified to allow .460 cases or .410.

    With the Derringer, case length, necking and any rotational binding should be a moot issue and reduce the number of stages to create the shotshell. After modification, there remains enough rifling to not annoy the ATF bear.

    I intend to test this as a shot cup/overpowder wad: Harvester Premium Sabots for 45 cal (H4540B & H14540BR) from Ballistic Products. They push down into the .460 case and seal the base of the shot with the sabot fingers. Im away from by bench for a few days, but I think it was close to 300gr of #11 shot before adding a 45 cal gas check to top it off.

    I have not settled on a powder charge yet.

    My Magtech Brass shotshells arrived after backorder and may prove to be an even simpler solution in the Derringer.
    Alcohol Inventory Reduction Specialist (Journeyman Level)

  4. #24
    Boolit Buddy
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    Rereading you load data I would think you would need to drill out the holes but maybe something to play with.

  5. #25
    Boolit Master
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    Quote Originally Posted by jim147 View Post
    Rereading you load data I would think you would need to drill out the holes but maybe something to play with.
    Why???
    Do you really think any size increase in/on a standard flash hole size would have any use-/meaningfull impact in/on powder burn in such a small powder charge?

    How fast can you roast a marshmallow?

    If you have a bonfire 10 times the size can you do it in 1/10'th the time?

    Then why do you think a (way) larger flash hole would ignite a small amount of gunpowder way faster and way batter than a standard size one?

  6. #26
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    Quote Originally Posted by 17nut View Post
    Why???
    Do you really think any size increase in/on a standard flash hole size would have any use-/meaningfull impact in/on powder burn in such a small powder charge?

    How fast can you roast a marshmallow?

    If you have a bonfire 10 times the size can you do it in 1/10'th the time?

    Then why do you think a (way) larger flash hole would ignite a small amount of gunpowder way faster and way batter than a standard size one?
    Enlarging the flash hole isn't intended to better ignite the powder. The intended purpose is to release the pressure of the exploding primer compound forward into the case and to lessen the problem of primer set back, which locks up the cylinder. There isn't enough pressure built up with the light charge of powder to drive the case back hard enough to reseat the primer into the primer pocket all the way. By drilling out the flash hole to 1/8", it gives the pressure a larger vent forward.

    Hope this helps.

    Fred
    After a shooting spree, they always want to take the guns away from the people who didn't do it. - William S. Burroughs.

  7. #27
    Boolit Master
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    Yes, drilling out the flash hole in a few cases is my next step. I did ponder the thought that the tapered shoulder and case set-back could be another issue causing, or adding to the problem. But then, I thought about all the cartridges chambered in revolvers that have a shoulder, even it be small. The 38-40, 32-20, 25-20 come to mind, with no issues with the case set back enough to bind the cylinder. I'll do a range report, and update the results. Thank you all for your input.
    Last edited by littlejack; 05-10-2021 at 06:57 PM.
    If a 41 won't stop it, I wouldn't bet my life on a 44.

  8. #28
    Boolit Buddy
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    Looking back, you are dropping the charges so yes drilling out primer hole might help. You have a plus on this. Since you are not using .45 brass you don't have to mark them as shot loads only.

  9. #29
    Boolit Master
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    Last edited by littlejack; 05-11-2021 at 12:47 AM.
    If a 41 won't stop it, I wouldn't bet my life on a 44.

  10. #30
    Boolit Master
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    Sorry for the slow update. I did drill out the flash hole in five of the 460 cases. At the range session, there was still a small amount of setback. There may be a little to much clearance between the firing pin, and the firing pin hole, allowing a minute amount of primer to bleed into the gap, and cause drag. I will try both dropping the powder charge a bit, and drilling the flash hole a bit larger, and do another range session.
    Another range report coming.
    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