They work beautiful on Sporters in my opinion. 270/30-06, 300 Mag, 264, 338.
I think they’re “big” for a Featherweight sized gun.
338 Win
375 Improved
No idea if they’d work with a 550.
I’d be fine with one on a 70 Standard though. It was always sorta my plan to find a beat up 30-06 or 270 and make a Whelen and put it in a Legend.