In building a rifle on a 98 for hunting, I would not be choosing a .458 or larger. Even a .416 would be larger than I wanted for a hunting rifle. A stopping rifle is different and not generally needed by a hunter. Hunt well and shoot well, then the quarry is yours.

With that in mind, a .375 (or .9.3x62) would be perfect. They worked for too long, to stop working now.

The .375 Chatfield Taylor would work, as-would my .375/06IMP.

Each to his own here, I believe.

If your ammo doesn't show up or is stolen, ahhh - rent or borrow a rifle & ammo from the PH & carry on.