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Thread: S&W Model 10-5 Lead buildup just ahead of forcing cone?

  1. 07-19-2021, 08:33 PM #41
    robertbank
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    Spot on guy. Good luck the 38 spl cartridge is a versatile, easy to load cartridge with a hoast of bullet designs available.

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  2. 07-19-2021, 10:32 PM #42
    Chill Wills
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    Trying to learn a little. I read - Cutting the forcing cone to 11 degrees improves the transition. What is the factory forcing cone cut to? greater or lesser than 11 degrees?
    Chill Wills
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  3. 07-19-2021, 10:58 PM #43
    Outpost75
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    Quote Originally Posted by Chill Wills View Post
    Trying to learn a little. I read - Cutting the forcing cone to 11 degrees improves the transition. What is the factory forcing cone cut to? greater or lesser than 11 degrees?
    Great question. The factory forcing cones in S&W and older Rugers, such as the "Six" series, was 18 degrees included angle. Using an 11 degree reamer enables you to clean up circumferential tool marks without enlarging the base diameter of the forcing cone entrance, which should not exceed 1.05 times max bullet diameter. Colts usually came 11 degrees from the factory. Jim Clark, Bob Day, Reeves Jungkind and Bob Collins generally used a more gentle 6 to 9 degree forcing cone on their PPC guns.
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  4. 07-19-2021, 11:42 PM #44
    robertbank
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    Quote Originally Posted by Outpost75 View Post
    Great question. The factory forcing cones in S&W and older Rugers, such as the "Six" series, was 18 degrees included angle. Using an 11 degree reamer enables you to clean up circumferential tool marks without enlarging the base diameter of the forcing cone entrance, which should not exceed 1.05 times max bullet diameter. Colts usually came 11 degrees from the factory. Jim Clark, Bob Day, Reeves Jungkind and Bob Collins generally used a more gentle 6 to 9 degree forcing cone on their PPC guns.
    The GP-100 are 5 degrees ir rather that is what I was told they are.

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  5. 07-20-2021, 12:03 AM #45
    samari46
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    Had some of the old federal 246 grain lead bullet 44 special ammunition. Not knowing the alloy I did a light coat of Lee alox lube on the exposed nose section. After a couple shots you could smell that familiar aroma. 50 rounds through the revolver and no leading. And my free loading buddy asked for the brass. No way, was shooting my S&W 624 with the 6.5" barrel. And he didn't even have a 44 special. Frank
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  6. 07-20-2021, 10:42 PM #46
    Chill Wills
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    Quote Originally Posted by Outpost75 View Post
    The factory forcing cones in S&W and older Rugers, such as the "Six" series, was 18 degrees included angle. Using an 11 degree reamer enables you to clean up circumferential tool marks without enlarging the base diameter of the forcing cone entrance, which should not exceed 1.05 times max bullet diameter.
    Thank you for the explanation.
    Chill Wills
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  7. 07-21-2021, 11:57 AM #47
    Outpost75
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    Quote Originally Posted by robertbank View Post
    The GP-100 are 5 degrees ir rather that is what I was told they are.

    Take Care

    Bob
    GP100 production came about after I left the company, but from eyeballing examples in the LGS your observation appears correct.
    Should work really well.
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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