Description
Norma MRP (Magnum Rifle Powder) is a slow-burning rifle propellant with a burn rate of 0.7, ideally suited for magnum calibers and large-capacity cases. This powder's slow combustion characteristics make it an excellent choice for achieving high velocities with maximum power in cartridges used for long-range hunting and shooting. MRP's granular, stick-type composition ensures consistent metering, though users should verify charges in high-volume reloading to maintain precision. Known for its remarkable temperature stability, MRP maintains steady performance across diverse environmental conditions, minimizing issues related to temperature swings that can affect shot consistency. This powder is favored among reloaders for cartridges such as the 300 Winchester Magnum, 338 Lapua Magnum, and other similar high-performance calibers. When developing loads, MRP allows for fine-tuning to optimize ballistic performance and accuracy. Its steady burn rate and temperature stability make it an asset for handloaders seeking to maximize their rifle's potential while maintaining safe operating pressures.
Specifications
Burn Rate
1.6 (Slow)
Bulk Density
0.960 g/cm³
Density
1.610 g/cm³
Temperature Sensitivity
Low
Suitable Substitutes
Powders with a similar burn rate that may be suitable alternatives (also see burn rate chart):
Standard Loads — Norma MRP
Verified load data combinations using Norma MRP.
.22 Creedmoor
A-Square .224 | 72gr | A-Square e 72gr
.22 Creedmoor
Barnes .224 | 69gr | Barnes Match Burner BT 69gr
.22 Creedmoor
Barnes .224 | 70gr | Barnes TAC-X 70gr
.22 Creedmoor
Barnes .224 | 70gr | Barnes TSX BT 70gr
.22 Creedmoor
Barnes .224 | 77gr | Barnes Match Burner BT 77gr
.22 Creedmoor
Barnes .224 | 77gr | Barnes LRX BT 77gr
.22 Creedmoor
Barnes .224 | 78gr | Barnes TSX BT 78gr
.22 Creedmoor
Barnes .224 | 85gr | Barnes Match Burner 85gr
.22 Creedmoor
Berger .224 | 69gr | Berger BT Target 69gr
.22 Creedmoor
Berger .224 | 70gr | Berger VLD Target 70gr
.22 Creedmoor
Berger .224 | 70gr | Berger LTB 70gr
.22 Creedmoor
Berger .224 | 73gr | Berger BT Target 73gr
.22 Creedmoor
Berger .224 | 75gr | Berger VLD Target 75gr
.22 Creedmoor
Berger .224 | 77gr | Berger OTM Tactical 77gr
.22 Creedmoor
Berger .224 | 77gr | Berger LTB 77gr
.22 Creedmoor
Berger .224 | 80gr | Berger VLD Target 80gr
.22 Creedmoor
Berger .224 | 80.5gr | Berger Fullbore Target 80.5gr
.22 Creedmoor
Berger .224 | 82gr | Berger LTB 82gr
Subsonic Loads — Norma MRP
Verified subsonic load data combinations using Norma MRP.
.30-06 Spring.
Berger .308 | 230gr | Berger Hybrid Target 230gr
.30-06 Spring.
Berger .308 | 230gr | Berger Hybrid OTM Tactical 230gr
.30-06 Spring.
Discreet Ballistics .308 | 188gr | Discreet Ballistics Selous Machined Expander 188gr
.30-06 Spring.
Hornady .308 | 175gr | Hornady Sub-X 175gr
.30-06 Spring.
Hornady .308 | 190gr | Hornady Sub-X 190gr
.30-06 Spring.
Lapua .308 | 200gr | Lapua Subsonic 200gr
.30-06 Spring.
MAKER .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets 200gr
.30-06 Spring.
MAKER .308 | 220gr | MAKER 300 blackout 220gr
.30-06 Spring.
Peregrine .308 | 155gr | Peregrine Subsonic 155gr
.30-06 Spring.
Reichenberg .308 | 154gr | Reichenberg HDB Subsonic 154gr
.30-06 Spring.
Reichenberg .308 | 200gr | Reichenberg Subsonic 200gr
.30-06 Spring.
Sierra .308 | 220gr | Sierra MatchKing 220gr
.30-06 Spring.
Styria Arms | AERO .308 | 190gr | AERO SUB,- smax:23.90 190gr
6.5 Creedmoor
Lehigh Defense .264 | 130gr | Lehigh Defense Controlled Chaos 130gr
6.5 Creedmoor
RWS .264 | 159gr | RWS TMR 159gr
7.5 x 55 Swiss
Berger .308 | 210gr | Berger VLD Target 210gr
7.5 x 55 Swiss
Discreet Ballistics .308 | 188gr | Discreet Ballistics Selous Machined Expander 188gr
7.5 x 55 Swiss
Hornady .308 | 175gr | Hornady Sub-X 175gr
Community Loads — Norma MRP
Sample load data calculated with Norma MRP.
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| Cartridge | Bullet | Barrel (in) | Charge (gr) | OAL (in) | Case Volume (GoW) | Max. Pressure (psi) | Muzzle Velocity (fps) |
|---|---|---|---|---|---|---|---|
| .243 | 108gr | Hornady ELD-Match | 24.0 | 44.1 | 2.80 | 55.6 | 42,888 (78%) | 2818 | |
| .243 | 108gr | Hornady ELD-Match | 20.0 | 44.1 | 2.79 | 55.6 | 43,265 (78%) | 2677 | |
| .243 | 100gr | Nosler Partition SP | 23.6 | ••.• | 2.68 | 54.0 | 54,041 (90%) | 3002 | |
| .243 | 100gr | Sierra SBT GameKing | 24.0 | ••.• | 2.71 | 54.0 | 52,968 (88%) | 2999 | |
| .243 | 80gr | Fox Classic Hunter | 20.0 | ••.• | 2.71 | 54.0 | 48,527 (81%) | 2979 | |
| .243 | 103gr | Hornady ELD-X | 22.0 | ••.• | 2.71 | 54.0 | 52,315 (87%) | 2890 | |
| .243 | 103gr | Hornady ELD-X | 22.0 | ••.• | 2.71 | 54.0 | 50,372 (84%) | 2854 | |
| .243 | 115gr | Berger VLD Target L1.332 | 20.0 | ••.• | 2.71 | 54.0 | 57,334 (95%) | 2759 | |
| .243 | 115gr | Berger VLD Target L1.332 | 20.0 | ••.• | 2.71 | 54.0 | 56,188 (93%) | 2743 | |
| .243 | 115gr | Berger VLD Target L1.332 | 20.0 | 44.0 | 2.71 | 54.0 | 55,071 (91%) | 2726 | |
| .243 | 100gr | Fox Classic Hunter | 21.7 | ••.• | 2.71 | 54.0 | 40,734 (68%) | 2680 | |
| .243 | 103gr | Hornady ELD-X | 22.0 | ••.• | 2.71 | 54.0 | 38,856 (65%) | 2631 | |
| .243 | 103gr | Hornady ELD-X | 22.0 | ••.• | 2.71 | 54.0 | 33,591 (56%) | 2500 | |
| .308 | 200gr | Hornady ELD-X | 24.0 | ••.• | 3.57 | 99.0 | 54,476 (84%) | 2867 | |
| .308 | 200gr | Hornady ELD-X | 24.0 | ••.• | 3.57 | 99.0 | 48,254 (74%) | 2766 | |
| .308 | 180gr | Nosler Partition PP | 21.7 | ••.• | 3.60 | 112.5 | 55,637 (86%) | 2831 | |
| .308 | 200gr | Sierra HP MatchKing L1.29 | 20.0 | ••.• | 3.60 | 112.5 | 68,284 (105%) | 2815 | |
| .308 | 200gr | Sierra HP MatchKing L1.29 | 21.7 | ••.• | 3.60 | 112.5 | 61,380 (94%) | 2795 |
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