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THE CARTRIDGE LIBRARY · PISTOL

.32 ACP

Also called 7.65mm Browning, this is a small semiautomatic-pistol cartridge with a semi-rimmed case. Its metric designation can be more recognizable outside the United States.

2A Ledger reference desk · Sources checked October 18, 2026

.32 ACP · Studio brass dimensional referenceDimensions in inches and millimeters. Overall length minimum: 0.890 in, 22.606 mm; Overall length maximum: 0.984 in, 24.994 mm; Case length maximum: 0.680 in, 17.272 mm; Rim diameter maximum: 0.358 in, 9.093 mm; Bullet maximum: 0.3125 in, 7.938 mmOVERALL · MIN–MAX0.890–0.984 in22.606–24.994 mmCASE LENGTH · MAX0.680 in17.272 mmBULLET Ø · MAX0.3125 in7.938 mmRIM Ø · MAX0.358 in9.093 mm
Published cartridge dimensions · SAAMI drawing ↗
Read the dimensions
Overall · min–max
0.890–0.984 in
22.606–24.994 mm
Case length · max
0.680 in
17.272 mm
Bullet maximum
0.3125 in
7.938 mm
Rim diameter · max
0.358 in
9.093 mm

Know the exact name

At a glance

Cartridge family
Pistol
Bullet specification
0.3125 in / 7.938 mmBullet maximum
Factory examples
7 loadsSelected, sourced examples below
Weight in cited examples
60–73 grGrains measure mass, not powder charge

.32 ACP is identified by its complete cartridge designation. The resource-table alternative is 7.65 mm Browning. A caliber number, bullet diameter, or family resemblance on its own does not identify ammunition compatibility.

.32 ACP, .32 S&W Long, and .32 H&R Magnum are different cartridge specifications.

Dimensions: open the exact dimensional drawing ↗. The displayed number is bullet maximum, rather than an assertion that every manufactured projectile or barrel has this exact diameter.

Origins & evolution

Background & development

John Browning designed the .32 ACP near the end of the 1890s for his early successful automatic pistols. In Europe it became better known as the 7.65 mm Browning, while the ACP name became familiar in the American market. The semi-rimmed cartridge belonged to the first generation of commercially successful small automatic-pistol ammunition.

Its influence extended well beyond one Browning or FN pistol. Walther, Mauser, Colt, Smith & Wesson and other makers chambered compact handguns for it, and European police and military services adopted it in substantial numbers. That service history helps explain why so many carefully made older pistols use a cartridge now regarded as relatively modest. As service-pistol requirements changed, the 9 mm increasingly replaced it, but the .32 ACP remained part of the pocket-pistol market and a lasting link to the early development of the automatic handgun.

Historical sources: Sierra: .32 ACP cartridge history ↗

Construction changes the story

Loads, variations & specialty offerings

Practice & target

Full-metal-jacket, plated, lead, and wadcutter bullets describe different constructions. Grain weight is projectile mass; it does not state a powder charge or guarantee recoil.

Expanding factory bullets

JHP, XTP, FTX, HST, and similar product names refer to particular designs. Muzzle energy alone does not show expansion, penetration, or reliability in a particular firearm.

Specialty load families

Reduced-recoil, subsonic, monolithic, and heavier-bullet offerings are product-specific. A +P marking is a pressure category where standardized, not simply a heavier bullet. Follow the maker’s exact product and firearm guidance.

The expanded factory selection spans 60–73 grains. Exact products and source conditions appear in the table.

Bullet construction background: Hornady: anatomy of a bullet ↗. Exact product descriptions and velocities are cited in the factory table.

The table also distinguishes ordinary factory loads. Published test conditions and product-specific notes accompany each addition; no velocity curve is inferred from one muzzle specification.

From the factory catalog

Compare all 7 cited factory load records
Factory catalog examples, not purchase recommendations. V / -V denotes a vented test barrel where shown by the source. Unstated test lengths have not been inferred.
Maker / productBullet massPublished constructionMuzzle velocityTest barrelSource
Hornady9006260 gr
3.89 g
XTP®1,000 fps
305 m/s
4 inHornady · PDF p. 191 ↗
Hornady9006360 gr
3.89 g
FTX®1,000 fps
305 m/s
4 inHornady · PDF p. 191 ↗
FederalP32HS165 gr
4.21 g
HYDRA-SHOK925 fps
282 m/s
4 inFederal · PDF p. 60 ↗
FederalP32HSD168 gr
4.41 g
HYDRA-SHOK DEEP1,000 fps
305 m/s
4 inFederal · PDF p. 60 ↗
FederalAE32AP71 gr
4.60 g
FMJ900 fps
274 m/s
4 inFederal · PDF p. 61 ↗
Fiocchi32APHP60 gr
3.89 g
SJHPStandard factory load. Its published velocity is not a guarantee of subsonic performance in every firearm or temperature.1,100 fps
335.3 m/s
Not statedFiocchi · PDF p. 28 ↗
Fiocchi32AP73 gr
4.73 g
FMJStandard factory load. Its published velocity is not a guarantee of subsonic performance in every firearm or temperature.1,000 fps
304.8 m/s
Not statedFiocchi · PDF p. 31 ↗

Explore the published data

Ballistics you can inspect

Select a legend entry to add or remove its line. Hover or tap a plotted point, or use the position slider. With the graph focused, arrow keys move the inspector. Solid dots identify source points; dashed connectors show estimates between them. Load construction, pressure category, and test setup can differ even at the same grain weight.

Read the original values as accessible tables

.32 ACP: velocity by barrel length

Barrel length (in): velocity (fps). Source points and stated unit conversions; intermediate estimates are excluded.
Exact loadSource / publisherPublished points
Cor Bon 60 gr. JHPBBTI2: 944; 3: 1,074; 4: 1,157; 5: 1,231; 6: 1,242; 7: 1,264; 8: 1,305; 9: 1,302; 10: 1,332; 11: 1,345; 12: 1,291; 13: 1,332; 14: 1,325; 15: 1,354; 16: 1,292; 17: 1,358; 18: 1,394
Federal 65 gr. Hydra-shok JHPBBTI2: 805; 3: 893; 4: 939; 5: 1,012; 6: 1,019; 7: 957; 8: 964; 9: 944; 10: 945; 11: 996; 12: 943; 13: 1,009; 14: 1,071; 15: 1,037; 16: 983; 17: 982; 18: 902
Winchester 71 gr. FMJBBTI2: 782; 3: 871; 4: 939; 5: 973; 6: 959; 7: 979; 8: 996; 9: 976; 10: 971; 11: 976; 12: 944; 13: 976; 14: 921; 15: 990; 16: 891; 17: 941; 18: 865
Winchester 60 gr. Silvertip HPBBTI2: 787; 3: 874; 4: 933; 5: 967; 6: 980; 7: 1,018; 8: 1,009; 9: 990; 10: 999; 11: 1,023; 12: 990; 13: 1,015; 14: 991; 15: 985; 16: 983; 17: 1,035; 18: 941

.32 ACP: factory velocity downrange

Distance (yd): velocity (fps). Source points and stated unit conversions; intermediate estimates are excluded.
Exact loadSource / publisherPublished points
60 gr Hornady XTP®Hornady0: 1,000; 50: 905; 100: 833
65 gr Federal HYDRA-SHOKFederal0: 925; 25: 892; 50: 862; 75: 834; 100: 808
68 gr Federal HYDRA-SHOK DEEPFederal0: 1,000; 25: 949; 50: 907; 75: 869; 100: 835
71 gr Federal FMJFederal0: 900; 25: 872; 50: 846; 75: 821; 100: 798
60 gr Hornady FTX®Hornady0: 1,000; 50: 882; 100: 797
60 gr Fiocchi SJHPFiocchi0: 1,100
73 gr Fiocchi FMJFiocchi0: 1,000

How to interpret the comparison

Changing bullet weight also often changes bullet design and propellant choice. Two curves are comparisons of the listed products, not a controlled experiment proving that bullet weight alone caused the difference. Catalog downrange points are projections under the maker’s conditions; barrel-study points are recorded observations in the study firearm.

Direct answers

Common questions

What is .32 ACP?

Also called 7.65mm Browning, this is a small semiautomatic-pistol cartridge with a semi-rimmed case. Its metric designation can be more recognizable outside the United States.

What diameter does .32 ACP use?

The cited dimensional standard lists 0.3125 inches (7.938 mm), bullet maximum. This drawing convention is different from a casual caliber nickname.

Are similarly named cartridges interchangeable?

.32 ACP, .32 S&W Long, and .32 H&R Magnum are different cartridge specifications.

Are the graph values measured or estimated?

Factory datasets show manufacturer specifications and any published downrange projections. Chronograph and barrel-study datasets identify recorded measurements and the original test source. Dashed connectors and intermediate inspector values are labeled linear estimates; single source points are not extended into invented curves. Energy is calculated from bullet mass and velocity.

Does higher energy mean the best load?

Energy is calculated from mass and velocity. It does not establish accuracy, expansion, penetration, pattern density, recoil, or suitability for a particular firearm. Use the exact product documentation and firearm manual.

Trace the facts

Sources & methodology

Skives & petals: read the jacket construction →

Compiled by 2A Ledger from the linked standards, manufacturer publications, and identified test records. Checked October 18, 2026. Historical tests and older catalogs retain their original dates; a listing here does not establish current availability.

  1. SAAMI: dimensional drawing · PDF p. 40 ↗
  2. Sierra: .32 ACP cartridge background ↗
  3. Hornady · PDF p. 191 ↗
  4. Federal · PDF p. 60 ↗
  5. Federal · PDF p. 61 ↗
  6. Ballistics by the Inch: archived measured barrel data (2020 archive) ↗
  7. BBTI: study index and source records ↗
  8. Additional factory specification / original test ↗
  9. Additional factory specification / original test ↗

Diameter figures preserve the cited drawing convention. Inch–millimeter conversion uses exactly 25.4 mm per inch. Factory specifications describe the maker’s test setup; your firearm, ammunition lot, temperature, and measuring method can produce different results. This is an educational factory-ammunition reference, not a reloading manual.