What is this velocity requirement? Does it have a bullet weight to go with it?
If you stoke up a .45-70 or .444 to 2,450 fps, you will not be using the heavier bullets which perform best on big game. And you will have to use the longer barrel rifles to achieve it, with about 3x the recoil of a .30-30. My Marlin 336RC Deluxe with its 24-inch barrel does 2,500 fps with ease, but it is not the handy woods rifle which the 20-inch carbine is.
The .30-30 will do it with hotter 150-gr bullets, some FTX ( flex tip ) loads, and with 130-gr Barnes ( as the first bullet, followed by FN ammunition).
The higher velocity lever actions are the Winchester 1895, a big rifle in .30-06 or .270, and the Savage 99s, if you still want to stay with century-old rifles from the Old West. Only the Savage 99 carbines are in the weight and size of the Marlin 336, for a handy tracking rifle.
After that, for velocity and power, you pretty much have to go to an older Sako, a Winchester Model 71 or the Browning reproduction ( both wonderful quality ), or the Browning BLR. I have a BLR Lightweight in 7mm-08, and it is the heir to the Win 71, with a rack and pinion mechanism but a rotating, locking bolt. The BLR is light and handy, and comes in magnums, and take down models, where you can buy extra barrels - a whole different trip than a Winchester 94 or Marlin 336 in .30-30.
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