Young Bulldog, Hornady lists the following reloading data for the .375 H&H Magnum using 220gr. bullets with an overall cartridge length of 3.350".
1. IMR 4064, starting load 64.4grs. produces 2500fps. MAXIMUM load 72.8grs. produces 2800fps.
2. RL-15, starting load 67.6grs. produces 2500fps. MAXIMUM load 74.5grs. produces 2800fps.
3. H4895, starting load 64.3grs. produces 2500fps. MAXIMUM load 74.8grs. produces 2800fps.
Hope this helps!
Steve Mace
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After today, its all historical
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