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.
THE CARTRIDGE LIBRARY · RIMMED CENTERFIRE
.454 Casull
A high-performance rimmed .45-family revolver cartridge. Its longer case and separate operating specification distinguish it from .45 Colt.
2A Ledger reference desk · Sources checked October 18, 2026
Read the dimensions
- Overall · min–max
- 1.665–1.765 in
42.291–44.831 mm - Case length · max
- 1.383 in
35.128 mm - Bullet maximum
- 0.4525 in
11.494 mm - Rim diameter · max
- 0.512 in
13.005 mm
Know the exact name
At a glance
- Cartridge family
- Rimmed centerfire
- Bullet specification
- 0.4525 in / 11.494 mmBullet maximum
- Factory examples
- 7 loadsSelected, sourced examples below
- Weight in cited examples
- 200–300 grGrains measure mass, not powder charge
.454 Casull is identified by its complete cartridge designation. The resource-table alternative is 454 Casull. A caliber number, bullet diameter, or family resemblance on its own does not identify ammunition compatibility.
Use of any shorter related cartridge depends on the firearm maker's explicit guidance. Similar case ancestry does not authorize substitution.
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
Dick Casull and Jack Fullmer developed the .454 during the late 1950s from work with the .45 Colt cartridge family. The project explored a much higher-performance revolver system, requiring a purpose-built cartridge and firearm rather than simply another ordinary .45 Colt load.
The cartridge later became closely associated with Freedom Arms revolvers, which brought the concept into recognizable factory production. That association helped establish the .454 Casull as an important step in the development of dedicated hunting handguns. Its commercial history predates the later .460 and .500 S&W introductions, and it was already a major reference point when those very large revolver cartridges appeared. The Casull’s significance lies in the move from individual experimentation to an integrated high-performance revolver and ammunition system. Its name commemorates the developer, while its place in the .45-caliber lineage explains both its ancestry and its separate identity.
Historical sources: Sierra: .454 Casull cartridge history ↗
Construction changes the story
Loads, variations & specialty offerings
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.
In the cited .454 Casull examples, bullet weights are 200, 240, 250, 260, 300 grains. These are the weights actually present in this source selection, not a claim that every possible loading is listed.
Bullet construction background: Hornady: anatomy of a bullet ↗. Exact product descriptions and velocities are cited in the factory table.
From the factory catalog
200 grains
1,950 fps
MonoFlex®
240 grains
1,900 fps
XTP® Mag
250 grains
1,530 fps
BARNES EXPANDER
Compare all 7 cited factory load records
| Maker / product | Bullet mass | Published construction | Muzzle velocity | Test barrel | Source |
|---|---|---|---|---|---|
| Hornady9151 | 200 gr 12.96 g | MonoFlex® | 1,950 fps 594 m/s | 7½ V in | Hornady · PDF p. 191 ↗ |
| Hornady9148 | 240 gr 15.55 g | XTP® Mag | 1,900 fps 579 m/s | 7½ V in | Hornady · PDF p. 191 ↗ |
| FederalP454XB1 | 250 gr 16.20 g | BARNES EXPANDER | 1,530 fps 466 m/s | 5.7-V in | Federal · PDF p. 60 ↗ |
| FederalF454FS1 | 260 gr 16.85 g | FUSION SP | 1,350 fps 411 m/s | 5.7-V in | Federal · PDF p. 61 ↗ |
| FederalP454SA | 300 gr 19.44 g | SWIFT A-FRAME | 1,520 fps 463 m/s | 5.7-V in | Federal · PDF p. 60 ↗ |
| Hornady91488 | 300 gr 19.44 g | DGH | 1,820 fps 555 m/s | 7½ V in | Hornady · PDF p. 191 ↗ |
| Hornady9150 | 300 gr 19.44 g | XTP® Mag | 1,650 fps 503 m/s | 7½ V in | Hornady · PDF p. 191 ↗ |
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
.454 Casull: factory velocity downrange
| Exact load | Source | Published points |
|---|---|---|
| 200 gr Hornady MonoFlex® | Hornady | 0: 1950; 50: 1731; 100: 1533 |
| 240 gr Hornady XTP® Mag | Hornady | 0: 1900; 50: 1678; 100: 1478 |
| 250 gr Federal BARNES EXPANDER | Federal | 0: 1530; 25: 1423; 50: 1326; 75: 1239; 100: 1165 |
| 260 gr Federal FUSION SP | Federal | 0: 1350; 25: 1266; 50: 1192; 75: 1130; 100: 1078 |
| 300 gr Federal SWIFT A-FRAME | Federal | 0: 1520; 25: 1410; 50: 1311; 75: 1223; 100: 1149 |
| 300 gr Hornady DGH | Hornady | 0: 1820; 50: 1646; 100: 1488 |
| 300 gr Hornady XTP® Mag | Hornady | 0: 1650; 50: 1490; 100: 1348 |
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 .454 Casull?
A high-performance rimmed .45-family revolver cartridge. Its longer case and separate operating specification distinguish it from .45 Colt.
What diameter does .454 Casull use?
The cited dimensional standard lists 0.4525 inches (11.494 mm), bullet maximum. This drawing convention is different from a casual caliber nickname.
Are similarly named cartridges interchangeable?
Use of any shorter related cartridge depends on the firearm maker's explicit guidance. Similar case ancestry does not authorize substitution.
Are the graph values measured or estimated?
The downrange view uses the exact manufacturer catalog records shown in the source table. Dashed connectors and intermediate inspector values use linear interpolation between the displayed source points. Calculated energy uses the listed 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.
- SAAMI: dimensional drawing · PDF p. 62 ↗
- Sierra: .454 Casull cartridge background ↗
- Hornady · PDF p. 191 ↗
- Federal · PDF p. 60 ↗
- Federal · PDF p. 61 ↗
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.