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Thread: HK Pistols with polygonal rifling - cast bullets .....what size ?

  1. #1

    HK Pistols with polygonal rifling - cast bullets .....what size ?

    I have a 40 cal hk P2000sk and am wondering if anyone has experience on what size to make the cast bullet for least amount of leading....I have a bit of experience with 44 mag revolver cast bullets and 444 Marlin T/C Contender cast bullets using Alox 238F and beeswax 50/50 - but this polygonal rifling is new to me.....any help appreciated ......

  2. #2
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    Smoke4320's Avatar
    Join Date
    Apr 2013
    Right here ..at least I was a minute ago
    slug the bore .. Go .002 over with a powdercoated bullet keep a reasonable speed for the alloy and you should be good
    Others may chime in as well
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  3. #3
    Boolit Master

    Join Date
    Jul 2010
    Ft. Lauderdale, FL
    I'd try what Smoke said. I tried for a USP45 and nothing anybody could think of could make that gun not lead with bare/lubed cast.

  4. #4
    Boolit Master

    Springfield's Avatar
    Join Date
    May 2005
    San Jose, California
    I have a Jericho in 9/41ae and a Tanfoglio in 40 S&W, all three poly barrels and I have never had a leading problem. And this was 15 years ago before I really knew that much about casting. Just lucky, I guess.

  5. #5
    Boolit Buddy
    Join Date
    Jul 2014
    Austin TX
    I have two H&K poly barreled pistols. A 40 and a 9mm. I had some problems with leading but found a slightly larger boolit was the key to success in both guns. I switched to powder coated because without a lubrsizer, it was too messy to do any quantity of boolits.
    I am quite happy with the polygonal bbls and lead boolits.

    Ed C

  6. #6
    Boolit Master
    StratsMan's Avatar
    Join Date
    Jun 2008
    St. Charles, MO
    I will echo the others... Glock 21, polygonal rifling, boolits powder coated and sized .452 = no leading

  7. #7
    Boolit Buddy arclight's Avatar
    Join Date
    May 2006
    Orange County, CA
    I've shot plenty of cast through a USP .40 without significant leading. None of these are pushing the envelope, however.

  8. #8
    Boolit Buddy

    Join Date
    Mar 2005
    Don't load for the .40, but cast and load for a USP '45 and I treat it just like any other gun . COWW and size and lube as usual.

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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