This powder is slightly slower than the discontinued MRP2. It was developed for the 30-378 Weatherby from start. Matches the 338 Norma Mag and 338 Lapua Mag perfect with heavy bullets. It is also a good candidate for almost every overbore cartridge like 7 Rem Mag, STW, Ultra Mags etc. Like the URP it contains a lot of energy and is less sensitive to temperature and moisture than most other powders.
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