MRP Load Data: 712 Published Loads in 43 Cartridges

Empirical Precision indexes 712 published loads for MRP (Norma) across 43 bottleneck rifle cartridges from 6 reloading sources, spanning projectile weights from 70 gr to 300 gr.

Open MRP in the Load Library Open interactive Burn Chart

Published Loads712

Cartridges43

Sources6

Bullet Weights70–300 gr

Always start low and verify against the original published source before loading.

Powder Data Sheet

Manufacturer: Norma
Grain Type: Single-perforated Extruded
Bulk Density: 960 kg/m³

Burn Rate Position

Position #118 of 145 rifle powders on the Empirical Precision relative burn chart (ordered fastest to slowest).

Nearest Faster: IMR 7828, IMR 7828SSC
Nearest Slower: N560, N165

A burn chart is a guide, not load data.

Cartridges Published (43)

Cartridge	Published Loads
300 Winchester Magnum	77
300 Weatherby Magnum	53
6.5 PRC	47
6.5-284 Norma	34
308 Norma Magnum	32
243 Winchester	30
300 H&H Magnum	26
6mm-284	24
7mm Remington Magnum	22
7mm STW	21
300 WSM	21
6.5x55 Swedish	20
30 Nosler	20
240 Weatherby Magnum	20
7mm Remington SAUM	19
280 Ackley Improved	18
300 Remington Ultra Magnum	18
7mm WSM	16
6.5mm-06	14
243 WSSM	14
300 PRC	14
338 Lapua Magnum	13
7mm Weatherby Magnum	12
33 Nosler	12
223 WSSM	12
280 Remington	11
340 Weatherby Magnum	11
7mm PRC	10
6mm Creedmoor	9
6.8 Western	8
338 Remington Ultra Magnum	7
6mm Remington	6
30-06 Springfield	6
260 Remington	6
270 Weatherby Magnum	6
375 Holland & Holland Magnum	4
27 Nosler	3
28 Nosler	3
264 Winchester Magnum	3
300 Remington SAUM	3
338 Winchester Magnum	3
25-06 Remington	2
257 Roberts	2

Sources Publishing Data (6)

Publisher	Published Loads
Berger	402
Nosler	174
Lyman	72
Hornady	52
Barnes	8
Sierra	4