I called Hornaday over 25 years ago to find their factory recipe for the 154 grain bullet. I was a new reloader and Hornady had stopped making that factory round. It was accurate in my 19" barreled 7x57.

It is 46.5 grains of H414 behind the 154 grain Interlock. That was safe then but current load books have that load a couple of grains over max now.

I've killed a bunch of whitetails with that load out just a little farther than 300 yds. It's been very safe in my 98 Oberndorf action and I'm sure a Ruger Number One could handle it with ease.

Dan