Isopeura,
Today just for the hell of it, I opened 375H&H cases to 0.411" to see what this 400H&H cartridge looks like ... very long slim and elegant I must say! I've always had a soft spot for the 0.411" calibre, I've just never got around to building one. With Hornady producing a 300gr spitzer, Barnes a 300gr TSX, plus the 400gr heavyweights in solid and softs, I reckon your going to have lots of fun!!
Cheers...
Con