I'm running 62.0 grains in my 376 20" and my 19" '03 and getting on average 2500.
I was wondering what an H&H pushed the same bullet and charge at, velocity wise, and from what length.

Just out of curiosity - what bullet and weight?

Sorry, 270FB SP. Hornady.

I’ve kind of wondered the same thing (though I haven’t played with either 4895 in any of my H&Hs). I recently shot a few 270 RN Hornadys over screens and saw 2400+ with 58.0 grains H4895, 2500+ with 59.0, and close to 2600 with 60.0; these speeds in a 20” 350 Rem Mag case/chamber necked to 375. TAC gets even more interesting.

2600 fps with H4895 and the 260 Partition in a short action 375 seems adequately lethal for my purposes.

Not 270's but my 22" .375 H&H gets around 2675 with 260-grain Partitions with 68.0 grains of IMR4895.