Does anyone have, or know of a source for, load data for the .375 Flanged Magnum, using powders available readily in North America, and giving pressures in other than tons per square inch? I can find nothing in Graeme Wright’s third edition.

CCMDoc has a Verney Carron in 375 Flanged that he just returned with from an African safari. I'll let him know about this thread...I'm sure he's got some loads to share.

I believe I am using about 65 grains of RL15 with 3/8" backer rod with a 300grn bullet. I will check my data for sure when I get back to it.

and CCMDoc told me his gun regulated with 84 grains of RL25. I have not tried this yet. I would think it would have to fill the case,but I could be wrong.

Shooting the British Double Rifle by Graeme Wright has all the data you need. If you have a double or for that matter a single rifle in a British caliber, you owe it to yourself to obtain a copy...

McKay's load with RL15 is within the range listed in Wright's text. Wright does not list any loads with RL25 so I cannot comment on that one.

Rel25 sounds like it would be too slow for 375-like applications. It's like Retumbo or H1000, but hey, whatever works!

Ron, check your threads at NE

84 grains of Reloder 25 or 80grains of Reloder 22 get a 300 grain pill to around 2,500fps out of my 26" barrels. No filler needed with either.