I have a 416 Rigby and I could load that up to nearly 416 Weatherby power, way beyond the Ruger, the Remington or the Taylor. But I noticed that with 400 grain bullets the Rigby is just fine at Rigby pressures, no need for me to go further - for me. Of course I'm in my 70's and have bursitis and arthritis.
I'm pretty sure a Taylor would be a good rifle for an old fart like me. I'm not positive what rifle I'd build it a Taylor on. I have a 375 Whelen AI on a Mauser action and a Mauser would work pretty good, I think. If I don't sell my tanger Ruger 77 in 7mm Mag, that could be re-barreled by ER Shaw I suppose and that would require very little extra work, I'd think.