IMR powder reloading data is shown below which is based on different cartridges and bullet weights keep all IMR powder in the list, so you get all IMR powder reloading data in one place. You can also check the table of content to jump on specific imr powder reloading data:
IMR Powder Reloading Data
IMR 3031 Reloading Data
IMR 3031 is a medium-fast rifle powder that is historically famous for the .30-30 Winchester and works exceptionally well in straight-walled cartridges like the .45-70 Government.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| .30-30 Winchester | 150 gr Round Nose | 29.0 | 32.5 | 2,350 |
| .30-30 Winchester | 170 gr Flat Nose | 27.0 | 29.2 | 2,150 |
| .45-70 Govt (Lever) | 300 gr JHP | 48.0 | 51.5 | 1,950 |
| .45-70 Govt (Lever) | 405 gr Cast Lead | 38.5 | 42.0 | 1,550 |
| .308 Winchester | 150 gr Spitzer | 40.0 | 44.2 | 2,750 |
IMR 4064 Reloading Data
IMR 4064 is one of the most versatile medium-burn rifle powders ever created, legendary for its accuracy in the .308 Winchester and .30-06 Springfield with mid-to-heavy bullets.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| .308 Winchester | 150 gr Spitzer | 43.0 | 47.7 | 2,900 |
| .308 Winchester | 168 gr BTHP Match | 41.5 | 45.9 | 2,750 |
| .308 Winchester | 175 gr BTHP Match | 41.0 | 45.0 | 2,650 |
| .30-06 Springfield | 150 gr Spitzer | 47.0 | 52.5 | 2,950 |
| .30-06 Springfield | 165 gr Spitzer | 46.0 | 50.5 | 2,800 |
IMR 4166 Reloading Data
Part of the Enduron line, IMR 4166 includes copper fouling eliminators and extreme temperature stability. It performs similarly to IMR 4064 but is tailored for modern precision cartridges.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| .308 Winchester | 168 gr BTHP Match | 41.0 | 45.3 | 2,720 |
| 6.5 Creedmoor | 120 gr Spitzer | 37.0 | 41.5 | 2,900 |
| 6.5 Creedmoor | 140 gr BTHP | 35.0 | 38.8 | 2,650 |
| .223 Winchester | 77 gr BTHP Match | 21.5 | 23.8 | 2,700 |
| .22-250 Remington | 55 gr V-MAX | 32.5 | 35.8 | 3,600 |
IMR 4198 Reloading Data
This fast-burning rifle powder is outstanding for small-capacity centerfire cartridges like the .222 and .223 Remington, as well as lightweight bullets in the .300 Blackout.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| .222 Remington | 50 gr Spitzer | 18.5 | 20.5 | 3,100 |
| .223 Remington | 55 gr FMJ-BT | 19.5 | 21.5 | 3,100 |
| .300 AAC Blackout | 125 gr Ballistic Tip | 16.5 | 17.8 | 2,000 |
| .300 AAC Blackout | 220 gr Subsonic | 10.0 | 11.2 | 1,020 |
| .45-70 Govt (Trapdoor) | 405 gr Cast Lead | 27.5 | 31.5 | 1,350 |
IMR 4227 Reloading Data
IMR 4227 bridges the gap between magnum pistol powders and fast rifle powders. It is the premier choice for heavy magnum revolver loads and the .300 Blackout.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| .357 Magnum | 158 gr JHP | 14.5 | 16.0 | 1,250 |
| .44 Remington Mag | 240 gr JHP | 22.0 | 24.0 | 1,450 |
| .454 Casull | 300 gr JHP | 28.5 | 31.5 | 1,600 |
| .300 AAC Blackout | 110 gr V-MAX | 17.0 | 18.5 | 2,150 |
| .300 AAC Blackout | 135 gr HPBT | 15.5 | 17.2 | 1,900 |
IMR 4320 Reloading Data
IMR 4320 is a very versatile medium-burning rifle powder. Although recently discontinued, it remains a historical favorite for short-action cartridges and medium-capacity cases like the .300 Savage and .308 Winchester.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| .22-250 Remington | 55 gr V-MAX | 32.0 | 34.5 | 3,500 |
| .300 Savage | 150 gr Spitzer | 38.0 | 41.5 | 2,600 |
| .308 Winchester | 150 gr Spitzer | 41.0 | 45.5 | 2,750 |
| .30-06 Springfield | 150 gr Spitzer | 46.5 | 50.5 | 2,850 |
IMR 4350 Reloading Data
IMR 4350 is one of the most widely used medium-slow burning powders in the world. It is the absolute gold standard for cartridges like the .243 Winchester, .270 Winchester, and 6.5 Creedmoor.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| .243 Winchester | 100 gr Spitzer | 38.0 | 42.0 | 2,900 |
| 6.5 Creedmoor | 140 gr BTHP | 39.0 | 42.5 | 2,700 |
| .270 Winchester | 130 gr Spitzer | 51.0 | 55.0 | 3,000 |
| .30-06 Springfield | 165 gr Spitzer | 52.0 | 56.5 | 2,800 |
IMR 4451 Reloading Data
Part of the modern Enduron line, IMR 4451 features a burn rate very similar to IMR 4350 but includes copper fouling eliminators and extreme temperature stability, making it ideal for precision long-range shooting.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| 6.5 Creedmoor | 143 gr ELD-X | 38.5 | 41.5 | 2,650 |
| .243 Winchester | 100 gr Spitzer | 39.0 | 42.5 | 2,920 |
| .270 Winchester | 130 gr Spitzer | 51.5 | 55.5 | 3,050 |
| .30-06 Springfield | 165 gr Spitzer | 52.5 | 56.5 | 2,820 |
IMR 4831 Reloading Data
IMR 4831 is a slow-burning powder tailored for magnum cartridges or standard cartridges shooting heavy-for-caliber bullets. It excels in the 7mm Remington Magnum and .300 Winchester Magnum.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| .270 Winchester | 150 gr Spitzer | 50.0 | 54.5 | 2,850 |
| 7mm Rem Magnum | 160 gr Spitzer | 58.0 | 62.5 | 2,900 |
| .300 Win Magnum | 180 gr Spitzer | 67.0 | 71.5 | 2,950 |
| .338 Win Magnum | 225 gr Spitzer | 65.0 | 70.0 | 2,750 |
IMR 4895 Reloading Data
IMR 4895 is a legendary medium-burn powder originally developed for the .30-06 military service rifle (M1 Garand). It provides exceptional accuracy and moderate pressure curves across a vast range of calibers.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| .223 Remington | 55 gr FMJ-BT | 23.0 | 25.5 | 3,100 |
| .308 Winchester | 168 gr BTHP Match | 40.0 | 44.5 | 2,650 |
| M1 Garand (.30-06) | 150 gr FMJ | 46.0 | 49.0 | 2,750 |
| .30-30 Winchester | 150 gr Flat Nose | 29.5 | 33.0 | 2,300 |
IMR 4955 Reloading Data
Part of the Enduron line, IMR 4955 falls right between IMR 4350 and IMR 4831 in burn rate. It is an exceptional choice for standard magnums and overbore cartridges, offering temperature stability and reduced copper fouling.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| .25-06 Remington | 100 gr Spitzer | 51.0 | 55.5 | 3,150 |
| .270 Winchester | 130 gr Spitzer | 53.0 | 57.0 | 3,000 |
| .300 Winchester Magnum | 180 gr Spitzer | 66.0 | 70.5 | 2,900 |
| .300 WSM | 165 gr Spitzer | 62.0 | 66.5 | 2,950 |
IMR 7828 Reloading Data
Originally developed for the .300 Weatherby Magnum, this is a classic, true magnum rifle powder. It provides maximum velocities for heavy bullets in large-capacity cases.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| .243 Winchester | 100 gr Spitzer | 42.0 | 46.0 | 2,950 |
| 7mm Remington Magnum | 160 gr Spitzer | 59.0 | 64.0 | 2,900 |
| .300 Weatherby Magnum | 180 gr Spitzer | 73.0 | 78.0 | 3,050 |
| 264 Winchester Magnum | 140 gr Spitzer | 58.0 | 63.5 | 3,000 |
IMR 7828 SSC (Super Short Cut) Reloading Data
This powder has the exact same burn rate and load data as standard IMR 7828, but the kernels are cut shorter. This allows it to meter much more smoothly through powder measures and pack more densely into the case, making it perfect for modern precision magnums.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| 7mm PRC | 160 gr CX | 63.0 | 68.0 | 3,000 |
| 7mm PRC | 175 gr ELD-X | 61.5 | 66.5 | 2,900 |
| 26 Nosler | 140 gr BTHP | 70.0 | 75.0 | 3,150 |
| 6.5-300 Weatherby Mag | 140 gr Spitzer | 74.0 | 79.0 | 3,300 |
IMR 7977 Reloading Data
Another Enduron powder, IMR 7977 sits in the same slow-burning class as H1000 and IMR 7828. It is highly sought after for heavy, high-BC bullets in large magnum cases where temperature insensitivity is critical for long-range precision.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| 7mm PRC | 175 gr ELD-X | 64.0 | 69.0 | 2,850 |
| .300 Winchester Magnum | 180 gr ELD-M | 70.0 | 75.5 | 2,950 |
| .300 PRC | 212 gr ELD-X | 73.0 | 78.5 | 2,820 |
| .338 Lapua Magnum | 250 gr BTHP Match | 85.0 | 91.0 | 2,850 |
IMR 8133 Reloading Data
The slowest burning powder in the IMR Enduron line, IMR 8133 is comparable to Retumbo. It is specifically engineered for ultra-magnum cartridges burning massive amounts of powder behind the heaviest bullets available.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| 28 Nosler | 175 gr BTHP | 76.0 | 81.5 | 3,000 |
| .300 PRC | 225 gr ELD-M | 74.0 | 80.0 | 2,750 |
| .300 Rem Ultra Mag | 200 gr Spitzer | 86.0 | 93.0 | 3,050 |
| .338 Lapua Magnum | 300 gr BTHP Match | 86.0 | 93.5 | 2,700 |
IMR 8208 XBR Reloading Data
This is a highly advanced, temperature-insensitive match powder. It is absolutely exceptional for medium-capacity rifle cartridges, especially the 6mm ARC, 6.5mm Grendel, and .223 Remington.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| 6MM ARC | 105 gr BTHP Match | 24.5 | 27.5 | 2,650 |
| 6.5mm Grendel | 123 gr ELD Match | 26.0 | 28.5 | 2,500 |
| .223 Remington | 55 gr V-MAX | 23.0 | 25.3 | 3,150 |
| .308 Winchester | 168 gr BTHP Match | 39.5 | 43.3 | 2,620 |
PB (Porous Base) Reloading Data
PB was a popular single-base extruded powder for target handgun and shotgun loads. It burns exceptionally clean and provides excellent accuracy for standard-pressure pistol cartridges.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| 9mm Luger | 115 gr JHP | 4.4 | 5.2 | 1,250 |
| .357 Magnum | 158 gr Cast Lead | 4.5 | 6.0 | 1,050 |
| .44 Remington Mag | 240 gr Cast Lead | 7.0 | 9.0 | 950 |
| .45-70 Govt (Reduced) | 405 gr Cast Lead | 12.0 | 14.5 | 1,000 |
SR 4756 Reloading Data
SR 4756 was a relatively slow-burning pistol and shotgun powder. It was highly favored for heavy field loads in handguns, offering excellent performance in magnums and heavy 9mm loads.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| 9mm Luger | 147 gr HP/XTP | 3.2 | 3.8 | 950 |
| .357 Magnum | 158 gr JHP | 6.5 | 8.0 | 1,200 |
| .44 Remington Mag | 240 gr JHP | 10.5 | 12.5 | 1,250 |
| .38-55 Winchester | 255 gr Cast Lead | 8.5 | 10.5 | 1,100 |
SR 4759 Reloading Data
SR 4759 is legendary among cast-bullet shooters and those looking for Reduced Recoil rifle loads. It is a very bulky powder, which allows it to fill large rifle cases nicely even with very light charge weights.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| Reduced 30-30 Win | 150 gr Cast Lead | 14.0 | 16.5 | 1,450 |
| Reduced 308 Win | 165 gr Cast Lead | 17.0 | 20.0 | 1,550 |
| Reduced 30-06 SPRG | 165 gr Cast Lead | 18.0 | 22.0 | 1,600 |
| 45-70 Govt (Trapdoor) | 405 gr Cast Lead | 24.0 | 27.0 | 1,350 |
SR 7625 Reloading Data
SR 7625 was a fast-burning, single-base powder used extensively for standard-velocity handgun loads. It performed beautifully with lead bullets and mid-weight jacketed bullets.
| Cartridge | Bullet Weight & Type | Min Charge (gr) | Max Charge (gr) | Max Velocity (fps) |
| 9mm Luger | 115 gr JHP | 4.4 | 5.2 | 1,200 |
| .357 Magnum | 158 gr Cast Lead | 5.5 | 7.0 | 1,150 |
| .44 Remington Mag | 240 gr Cast Lead | 8.0 | 10.0 | 1,000 |
| .30 Carbine | 110 gr FMJ | 5.0 | 6.0 | 1,400 |
Instructions for Safe Load Development
- Always Cross-Reference: Treat this manual as a quick-reference companion. Before loading, always verify these charges against the most current data published directly by powder and bullet manufacturers to ensure nothing has been updated.
- Start Low and Work Up: Never start at the maximum charge. Always begin at the listed minimum charge and increase in small increments (e.g., 0.2 to 0.5 grains, depending on the overall case capacity).
- Monitor for Overpressure: After firing each test string, carefully inspect your fired brass. Stop immediately if you see flattened or cratered primers, experience heavy bolt lift, or notice ejector marks on the case head.
- Maintain Component Consistency: Load data is highly specific. Changing the primer brand, case manufacturer, or bullet seating depth alters the internal volume and ignition rate, which can dramatically shift pressures.
Reloading Frequently Asked Questions
- Can I substitute a different brand of primer or brass?No. Internal case volume varies by manufacturer, and primer brisance (spark intensity) differs by brand. If you change any component—even moving from one brand of brass to another for a sensitive cartridge like the 6mm ARC or .300 Blackout—drop your powder charge back to the minimum and work up again.
- What should I do if my exact bullet weight isn’t listed?If you cannot find your exact bullet weight, use the load data for the next heaviest bullet of similar construction. Never use data for a lighter bullet, as pushing a heavier bullet with a lighter bullet’s powder charge will result in dangerous pressure spikes.
- Why is my powder charge filling the case entirely?Some slow-burning powders require a “compressed load,” meaning the base of the bullet crunches into the powder when seated. This is perfectly safe only if the manufacturer’s data explicitly lists it as a compressed load (often denoted with a “C”).
- How does temperature affect my reloads?Ammunition loaded to maximum pressure in winter can become dangerously over-pressured in the heat of summer. Unless you are using a specifically temperature-insensitive powder, always back off your maximum charges and re-test when the seasons change.