RepackboxWidenersTitan ReloadingMidSouth Shooters Supply
Lee PrecisionReloading EverythingLoad DataRotoMetals2
Inline Fabrication
Page 1 of 2 12 LastLast
Results 1 to 20 of 33

Thread: question about 32 acp sizes?

  1. #1
    Boolit Buddy
    Join Date
    Feb 2012
    Location
    Cocoa, FL
    Posts
    276

    question about 32 acp sizes?

    So I have a kommer model 4 that I got on a whim a few years ago and got a hankerin to reload some 32 acp for it (7.65marked on the slide) and i slugged it and bullet came out to be .307....

    Looking around .312 is normal 32 acp? Wow... is this real, what did i stumble into here? Anyone else seen 32 acp go so small?

  2. #2
    Boolit Master
    JWFilips's Avatar
    Join Date
    Feb 2012
    Location
    Northeastern part of Penn's Woods near Slocum Hollow.
    Posts
    1,920
    My French MAB Model D slugs .309 But I still shoot .312 in it
    " Associate with men of good quality, if you esteem your own reputation: for it is better to be alone than in bad company. " George Washington

  3. #3
    Boolit Master


    dondiego's Avatar
    Join Date
    Jan 2013
    Location
    Milan, MI
    Posts
    2,811
    If .312 boolits won't chamber, try a .309 or 310 sizer on them.

  4. #4
    Boolit Grand Master Outpost75's Avatar
    Join Date
    May 2013
    Location
    over the hill, out in the woods and far away
    Posts
    10,158
    .32 ACP barrels vary greatly. I have seen them everywhere from .307" to .315", but a, .312 works in most.
    The ENEMY is listening.
    HE wants to know what YOU know.
    Keep it to yourself.

  5. #5
    Boolit Grand Master

    gwpercle's Avatar
    Join Date
    Sep 2011
    Location
    Baton Rouge, Louisiana
    Posts
    9,251
    I never measured the bore of my Walther PPK. The Lyman manual said to use mould 311252 - 77 grain or 313249 - 84 grain and size them .309 . I bought the 77 grain mould and had the .309 sizer for 30-06 , 30-30 and 7.5 Swiss , so used it . Somehow the loads worked fine with 2.0 grains of Bullseye ! Back then there was no computer, no internet and I only had a yardstick to measure things with and the old Lyman Cast Bullet Handbook .
    I just checked the latest Lyman Handbook ...it says to size them .309 and still shows those same two boolits for loading. Not much has changed.
    Gary
    Certified Cajun
    Proud Member of The Basket of Deplorables
    " Let's Go Brandon !"

  6. #6
    Boolit Grand Master Outpost75's Avatar
    Join Date
    May 2013
    Location
    over the hill, out in the woods and far away
    Posts
    10,158
    My Walther PP is .309, both my Berettas are .312, my Colt M1903 Type III is .311, I use .312 cast bullets in all of them. Measuring jacketed bullets on factory ammo I have, Norma is .307, WW2 Geco and modern RWS are both .309, WW2-era Remington-UMC .312, WW2-era WRA .312, modern Fiocchi, Hornady and Magtech bullets are all .312.
    The ENEMY is listening.
    HE wants to know what YOU know.
    Keep it to yourself.

  7. #7
    Boolit Buddy
    Join Date
    Feb 2012
    Location
    Cocoa, FL
    Posts
    276
    Wow these little guys are all over the map.

  8. #8
    Boolit Grand Master

    gwpercle's Avatar
    Join Date
    Sep 2011
    Location
    Baton Rouge, Louisiana
    Posts
    9,251
    Quote Originally Posted by Outpost75 View Post
    My Walther PP is .309, both my Berettas are .312, my Colt M1903 Type III is .311, I use .312 cast bullets in all of them. Measuring jacketed bullets on factory ammo I have, Norma is .307, WW2 Geco and modern RWS are both .309, WW2-era Remington-UMC .312, WW2-era WRA .312, modern Fiocchi, Hornady and Magtech bullets are all .312.
    WOW ! talk about all over the place.
    Certified Cajun
    Proud Member of The Basket of Deplorables
    " Let's Go Brandon !"

  9. #9
    Boolit Buddy
    Join Date
    Feb 2012
    Location
    Cocoa, FL
    Posts
    276
    So there's no problem using .312 in a .307? Lead or fmj?

  10. #10
    Boolit Master
    JWFilips's Avatar
    Join Date
    Feb 2012
    Location
    Northeastern part of Penn's Woods near Slocum Hollow.
    Posts
    1,920
    Lead!
    " Associate with men of good quality, if you esteem your own reputation: for it is better to be alone than in bad company. " George Washington

  11. #11
    Boolit Master Guesser's Avatar
    Join Date
    May 2009
    Location
    North Central Montana; across the wide Missouri
    Posts
    2,069
    My Walther PP, 1965 vintage; performs really well with .309 cast bullets. I never did slug it since it worked so well with my first try of the .309 castings.

  12. #12
    Boolit Master
    Join Date
    Aug 2006
    Posts
    551
    I've used .311 for decades.
    Even find it works for .32S&W up to.327mag.

  13. #13
    Moderator
    Texas by God's Avatar
    Join Date
    Mar 2016
    Location
    Texas
    Posts
    14,334
    Quote Originally Posted by mistermog View Post
    Wow these little guys are all over the map.
    And they still shoot accurately in my experience. Every one I've owned. My PP shoots .307 Privis and Outpost's .312 lead hammers into little groups.

  14. #14
    Boolit Buddy
    Join Date
    Feb 2012
    Location
    Cocoa, FL
    Posts
    276
    Interesting... why is oversize so bad in every other caliber except 32s? Heh my old h&r swL is a .311. That'd be .004 over the acp?

  15. #15
    Boolit Master
    Join Date
    Feb 2015
    Location
    Central Iowa
    Posts
    1,427
    Quote Originally Posted by mistermog View Post
    Interesting... why is oversize so bad in every other caliber except 32s? Heh my old h&r swL is a .311. That'd be .004 over the acp?
    What do you mean?
    Ideally you want .001 or .002 over bore diameter if shooting a lead bullet. Most 32 ACP guns are small pocket sized guns shot at 5 to 10 yards. At these distances even a a poor fit bullet can get a 1 to 2 inch group which is good enough. Going .005 over isn't a good idea but it'll work.

  16. #16
    Boolit Grand Master Outpost75's Avatar
    Join Date
    May 2013
    Location
    over the hill, out in the woods and far away
    Posts
    10,158
    Throat size! NOT barrel groove diameter!

    With CIP chamber nearly all .32 ACPs will do best with .312", with min. SAAMI .3105-.311"

    Two-inch, ten shot groups at 50 feet are typical for decent pistol such as Colt M1903, or Walther PP with good ammo.


    I had custom barrels done for my Beretta pistols using Douglas .308" groove diameter barrels with 10" twist and min CIP chamber set up to headspace on case mouth which shoot 1" ten-shot groups at 25 yards off sandbags.
    Last edited by Outpost75; 04-02-2017 at 10:46 PM.
    The ENEMY is listening.
    HE wants to know what YOU know.
    Keep it to yourself.

  17. #17
    Boolit Master
    Join Date
    Feb 2015
    Location
    Central Iowa
    Posts
    1,427
    How's do you measure throat size in your autoloader? The vast majority of people go for .001 or .002 over "bore diameter" which is often times incorrectly referred to as groove diameter.

    Tight groups are definitely possible but very rarely do I see anyone shooting handguns at 25 yards much less small 32 ACP's

  18. #18
    Boolit Buddy
    rond's Avatar
    Join Date
    Sep 2009
    Location
    Ivanhoe, TX
    Posts
    407
    My Frommer gets .311 along with the rest of m .32s.

  19. #19
    Boolit Grand Master Outpost75's Avatar
    Join Date
    May 2013
    Location
    over the hill, out in the woods and far away
    Posts
    10,158
    Quote Originally Posted by reddog81 View Post
    How's do you measure throat size in your autoloader? The vast majority of people go for .001 or .002 over "bore diameter" which is often times incorrectly referred to as groove diameter.

    Tight groups are definitely possible but very rarely do I see anyone shooting handguns at 25 yards much less small 32 ACP's
    Read the sticky on making a pound cast.
    The ENEMY is listening.
    HE wants to know what YOU know.
    Keep it to yourself.

  20. #20
    Boolit Grand Master
    Join Date
    Mar 2005
    Location
    Lincoln, Nebraska
    Posts
    6,063
    Actually too often people here and elsewhere say "bore diameter" when they really mean groove diameter. Bore diameter is land to land. Groove diameter is groove to groove. Of the two groove diameter is the larger dimension.

    0.001 to 0.002" over "bore diameter" will produce a drastically undersized bullet that will not reach the bottom of the grooves.

    Outpost's preferred dimension of "throat size" very well may be larger than groove diameter and often is.

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
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