Glad that you asked that question.... I am planning a safari next year. The PH is an advocate for DoubleTap ammunition indicating that the best .375 H&H round for leopard is made by DoubleTap using a 260 grain Nosler Accubond bullet. He indicates that they claim 3000 FPS. I wanted to get a sense as to whether this was possible without exceeding the SAAMI specification.
I think that I now have the answer, based on the posts as well as my checking the various bullet and powder manufacturers websites. Best reported is 3790 or so using RL15. Keep in mind that I have heard that manufactures is to back off so that pressure is 2% or so below max pressure when publishing their reloading data. However, a 2% nominal decrease from maximum pressure wont amount to a cup of warm spit in terms of muzzle velocity. So unless DoubleTap has found a supply of pixie powder that generates higher velocity without increasing internal pressures over SAAMI maximum they are either stretching the claim of 3000FPS or they are overloading those rounds. If course, it is always possible that the PH misheard the claimed muzzle velocity.
I will probably avoid using their ammunition in my .375.
I'm thinking you meant 2,790 fps with RL-15, which BTW is a respected and much used .375 H&H powder... I don't know what Double Tap is smoking, or loading, but don't think 3K is happening. Double Tap does advertise some pretty interesting data.
I'd be concerned about a "balls to the wall" load going to Africa with the potential of hot weather. Seems I remember reading reports of early .416 Rem loads with hard to open bolts in the heat due to excessive pressure. Not a good thing to happen while hunting DG.
Your PH must not be a gun nut, and reportedly a lot of them aren't.. Great hunters, maybe...
DF
