I had a nice Mauser 98 and had it built into a 458 Win mag, I loaded some 420 grain cast bullets with IMR 4166, which is close enough to the IMR 4064 load I was using.
The old Mauser has a 24 inch barrel, along with a Williams receiver sight and is drilled and tapped for scope if I want to add one later.
After some sight adjustment, I shot it out to 100 yds, it shot right to point of aim and made small rocks out of big rocks real fast.
The chrono said 1940 fps out of my Super Express Model 70 in 458, I am expecting a little more speed out of the Mauser 24 inch tube.
I would be happy with an even 2000 fps, but 1940 fps is enough for anything that walks around my neck of the woods.