Load Specifications
Load data in caliber .28 Nosler with .284 | 158gr | Prvi Partizan Grom bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Winchester StaBALL HD.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 90% | 55,201 psi | 85% | 2904 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 55,869 psi | 86% | 2927 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 57,899 psi | 89% | 3064 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 88% | 56,753 psi | 87% | 2992 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 92% | 58,668 psi | 90% | 3061 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 56,797 psi | 87% | 3028 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,198 psi | 79% | 2989 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 57,000 psi | 88% | 2989 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,029 psi | 88% | 2982 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,347 psi | 87% | 2979 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 90% | 55,230 psi | 85% | 2995 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 56,797 psi | 87% | 2963 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 56,507 psi | 87% | 3028 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 57,464 psi | 88% | 3054 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 53,954 psi | 83% | 3045 fps | 96.6% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 55,840 psi | 86% | 2959 fps | 97.2% |
| Bofors RP15 | <<locked>> | 94% | 58,073 psi | 89% | 3041 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 56,405 psi | 87% | 3038 fps | 99.6% |
| Bofors RP5 | <<locked>> | 90% | 55,230 psi | 85% | 2995 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 57,319 psi | 88% | 2923 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 58,436 psi | 90% | 3051 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 57,392 psi | 88% | 2982 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 58,218 psi | 90% | 2995 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 57,072 psi | 88% | 2976 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,159 psi | 88% | 2904 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 55,535 psi | 85% | 3114 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 58,073 psi | 89% | 3018 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,565 psi | 58% | 1873 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,854 psi | 86% | 2913 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 58,566 psi | 90% | 2943 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 56,231 psi | 87% | 2917 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 58,639 psi | 90% | 2972 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 92% | 56,768 psi | 87% | 3038 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 46,746 psi | 72% | 2894 fps | 98.2% |
| Lovex S065 | <<locked>> | 82% | 56,115 psi | 86% | 2890 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 57,986 psi | 89% | 2943 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 56,608 psi | 87% | 2923 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,014 psi | 88% | 2972 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 47,514 psi | 73% | 2920 fps | 99.7% |
| Norma MRP | <<locked>> | 88% | 55,245 psi | 85% | 3015 fps | 100% |
| Norma URP | <<locked>> | 84% | 57,812 psi | 89% | 2959 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 58,015 psi | 89% | 3064 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 56,826 psi | 87% | 2969 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 56,217 psi | 86% | 2992 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,421 psi | 59% | 1916 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,043 psi | 86% | 2949 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 58,581 psi | 90% | 3035 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,362 psi | 87% | 3107 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 55,608 psi | 86% | 3061 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 88% | 57,595 psi | 89% | 2959 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 88% | 55,883 psi | 86% | 2969 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 57,319 psi | 88% | 2923 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,115 psi | 86% | 2890 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 57,986 psi | 89% | 2943 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 58,740 psi | 90% | 2900 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,506 psi | 85% | 2963 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 55,376 psi | 85% | 2897 fps | 98.8% |
| Somchem S365 | <<locked>> | 84% | 55,317 psi | 85% | 2913 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,507 psi | 87% | 2943 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 55,709 psi | 86% | 2897 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 56,130 psi | 86% | 2923 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 98% | 58,813 psi | 90% | 2995 fps | 96% |
| Vihtavuori N550 | <<locked>> | 84% | 58,624 psi | 90% | 2956 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,259 psi | 85% | 2940 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 58,740 psi | 90% | 3077 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 94% | 55,201 psi | 85% | 2999 fps | 99.1% |
| Vihtavuori N568 | <<locked>> | 98% | 56,159 psi | 86% | 3061 fps | 98.4% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 57,276 psi | 88% | 3123 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 55,230 psi | 85% | 2851 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,392 psi | 88% | 2982 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 55,811 psi | 86% | 3048 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 56,347 psi | 87% | 2936 fps | 99.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 39,465 psi | 61% | 2621 fps | 99.1% |
| Accurate 4350 | <<locked>> | 80% | 52,243 psi | 80% | 2871 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 43,613 psi | 67% | 2799 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 43,526 psi | 67% | 2753 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 80% | 38,841 psi | 60% | 2680 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 88% | 37,797 psi | 58% | 2654 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 84% | 30,081 psi | 46% | 2490 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,816 psi | 67% | 2749 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,937 psi | 77% | 2871 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,453 psi | 67% | 2743 fps | 98.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,378 psi | 61% | 2690 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,145 psi | 59% | 2644 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,011 psi | 51% | 2566 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,685 psi | 66% | 2802 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 50,140 psi | 77% | 2976 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 49,153 psi | 76% | 2835 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 36,680 psi | 56% | 2625 fps | 96% |
| Bofors RP30 | <<locked>> | 86% | 37,536 psi | 58% | 2671 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 39,378 psi | 61% | 2690 fps | 97.1% |
| Bofors RP7 | <<locked>> | 80% | 53,795 psi | 83% | 2867 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 35,984 psi | 55% | 2612 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 53,650 psi | 83% | 2923 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 41,350 psi | 64% | 2687 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,683 psi | 63% | 2671 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,050 psi | 72% | 2749 fps | 100% |
| Hodgdon Retumbo | 66.7 gr | 82% | 34,432 psi | 53% | 2651 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 53,925 psi | 83% | 2956 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,108 psi | 43% | 1673 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,255 psi | 76% | 2802 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 55,056 psi | 85% | 2890 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 49,443 psi | 76% | 2812 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,859 psi | 66% | 2687 fps | 96.3% |
| IMR 7828 SSC | <<locked>> | 80% | 37,565 psi | 58% | 2661 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 94% | 38,174 psi | 59% | 2707 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 52,750 psi | 81% | 2838 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,155 psi | 79% | 2835 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 34,055 psi | 52% | 2497 fps | 97.8% |
| Norma 204 | <<locked>> | 80% | 49,676 psi | 76% | 2851 fps | 99% |
| Norma 217 | <<locked>> | 88% | 31,299 psi | 48% | 2546 fps | 95% |
| Norma MRP | <<locked>> | 80% | 41,553 psi | 64% | 2762 fps | 98.8% |
| Norma URP | <<locked>> | 80% | 50,807 psi | 78% | 2851 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,347 psi | 57% | 2667 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 49,676 psi | 76% | 2854 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,388 psi | 51% | 2543 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,776 psi | 44% | 1713 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,330 psi | 81% | 2890 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,618 psi | 78% | 2913 fps | 100% |
| ReloadSwiss RS 76 | 69.6 gr | 80% | 31,212 psi | 48% | 2552 fps | 95.5% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 40,988 psi | 63% | 2782 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 44,541 psi | 69% | 2726 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 80% | 42,931 psi | 66% | 2733 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 80% | 53,795 psi | 83% | 2867 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,750 psi | 81% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,155 psi | 79% | 2835 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,735 psi | 80% | 2792 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,583 psi | 66% | 2726 fps | 98% |
| Somchem S361 | <<locked>> | 80% | 45,310 psi | 70% | 2713 fps | 96.8% |
| Somchem S365 | <<locked>> | 80% | 48,399 psi | 74% | 2808 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,395 psi | 67% | 2710 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 80% | 52,257 psi | 80% | 2844 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,797 psi | 58% | 2582 fps | 97.2% |
| Vihtavuori N170 | <<locked>> | 96% | 54,969 psi | 85% | 2933 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 51,532 psi | 79% | 2848 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,482 psi | 65% | 2720 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,452 psi | 64% | 2749 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 84% | 39,320 psi | 60% | 2687 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 92% | 45,484 psi | 70% | 2867 fps | 96% |
| Vihtavuori N570 | <<locked>> | 96% | 49,501 psi | 76% | 2982 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,445 psi | 79% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,867 psi | 83% | 2927 fps | 100% |
| Winchester StaBALL HD | 66.8 gr | 80% | 35,215 psi | 54% | 2684 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,885 psi | 61% | 2638 fps | 97.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 72 powders for .28 Nosler loaded with the .284 | 158gr | Prvi Partizan Grom. Vihtavuori N570 delivers the highest muzzle velocity at 3,123 fps; across all powders the maximum-charge window runs from 1,873 fps to 3,123 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 158.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Hodgdon Retumbo, ReloadSwiss RS 76, Winchester StaBALL HD rank at the top here: for .28 Nosler with the .284 | 158gr | Prvi Partizan Grom they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.