NirtoX
I too have tried to find first hand information on double rifles in 375H&H with not much success. Several of my friends would like a double rifle in 375H&H but I hate to recommend it untill I get some first hand info. Most of these guys do not reload so they would be shooting factory loads.
After I recover financially form my Africa trip I may just have to get a Chapuis double rifle in 375 H&H and test it myself. After about 500 rounds of factory and reloads we should have some info to base a decision on.
Testing and pig hunting with the H&H double would help keep me from wearing my other doubles plum out.