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Thread: Correct boolet size for Ruger GP100 .38/357?

  1. 06-17-2018, 08:39 PM #1
    hc18flyer
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    Correct boolet size for Ruger GP100 .38/357?

    I am making up some cast boolets for a friend and don't have access to his pistol to check the cylinder and barrel. These are fairly soft, plain based 10.6 bhn plinker boolets. Can I size them to .358? I was only going to get a hundred ready, till he gets a chance to check them against his revolver. Thanks, hc18flyer
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  2. 06-17-2018, 09:56 PM #2
    nannyhammer
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    I run .359 in mine without issue.
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  3. 06-17-2018, 10:27 PM #3
    mike69
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    Mine had .357 throats
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  4. 06-18-2018, 10:00 AM #4
    Gene Perryman
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    Mine has .358 cylinder throats, but I regularly shoot Valiant .357 RNFP coated lightly with LLA with NO problems and excellent accuracy.
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  5. 06-18-2018, 10:53 AM #5
    Three-Fifty-Seven
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    . ...
    Last edited by Three-Fifty-Seven; 04-28-2020 at 07:25 AM.
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  6. 06-18-2018, 11:30 AM #6
    ReloaderFred
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    I size all mine at .358" for shooting through over a dozen revolvers. I have no leading problems at all with that diameter.

    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.
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  7. 06-18-2018, 11:59 AM #7
    ShooterAZ
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    I also size all my 38/357 to .358. Good accuracy and no leading.
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  8. 06-18-2018, 01:52 PM #8
    hc18flyer
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    Sounds great, .358 it is. And Tac 1 lube, should work fine! I recently bought a used 6 cavity MP 360 640. My first 6 banger, really high production compared to my 2 cavities! hc18flyer
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  9. 06-18-2018, 02:22 PM #9
    anothernewb
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    both of mine have .357ish throats as well. coated bullets work okay, but regular cast, leads up.
    There is a member on here - or who advertizes on here that apparently does a great job throating cylinders, as well as other machining. Although my mind is weak on a monday and I cannot remember who that is. I need to contact them myself as well and send him my cylinders.
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  10. 06-18-2018, 03:57 PM #10
    Ed_Shot
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    Quote Originally Posted by ShooterAZ View Post
    I also size all my 38/357 to .358. Good accuracy and no leading.
    Me too....for GP100, Security Six, amd Blackhawk.
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  11. 06-18-2018, 06:07 PM #11
    telebasher
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    Quote Originally Posted by anothernewb View Post
    both of mine have .357ish throats as well. coated bullets work okay, but regular cast, leads up.
    There is a member on here - or who advertizes on here that apparently does a great job throating cylinders, as well as other machining. Although my mind is weak on a monday and I cannot remember who that is. I need to contact them myself as well and send him my cylinders.
    That would be Dougguy at Cylinderhone. com. He can fix you up !
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  12. 06-18-2018, 09:28 PM #12
    EMC45
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    I size all my .38/.357 bullet at .358. Across the board.
    You can miss fast & you can miss a lot, but only hits count.
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  13. 06-18-2018, 10:38 PM #13
    robertbank
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    Quote Originally Posted by ReloaderFred View Post
    I size all mine at .358" for shooting through over a dozen revolvers. I have no leading problems at all with that diameter.

    Hope this helps.

    Fred
    Me too! or should that be all in caps. LOL

    Been a long hot day with temperatures in the back pits at our range over 38C - close to 100F, Drank lots of water and loved the heat.

    Take Care

    Bob
    Its been months since I bought the book, "How to scam people online". It still has not arrived yet!

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  14. 06-18-2018, 11:13 PM #14
    Minerat
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    my GP 100 likes .358's too.
    Steve,

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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