IMO the "best" is the .25 Bullberry. I've had mine for twenty years and it has never failed me on the silhouette range or in the hunting field. It is simply the .30-30 necked down, no other changes so it is simplicity itself to make cases. It has much more capacity than my .25-35 does, and a lot less taper. The .25-35 is plain wimpy in comparison. I usually shoot deer with the Nosler 100 BTip at 2537 fps - with sub-moa accuracy. No deer needed more than one shot either.
The .250 Savage factory ammo does not have "too much pressure" for the Contender, but too many folks were using hotter than factory loads, and with its tapered case design and large internal diameter it was trying up a lot of actions. The Bullberry equals what you can get out of a .250 Savage anyway.
.
