I've read a lot over my lifetime about how the Mauser derived chamberings (Xx57) needed a 'longer-than-a-traditional-short-action' action length. And yet when loading for 257 Roberts, I find that most 25cal field bullets (and the SAAMI chamber spec for 257 Roberts) have been designed for traditional short actions, and I almost always wind up with an OAL in the ballpark of 2.75"-2.80" (even thought I have a Savage short action with a bolt throw / magazine box that will accommodate up to 3.0" OAL). Only the 115-135gr VLDs really seem to be able to use the extra length that the Savage offers, and even then not fully due to the SAAMI chamber specs for leade/freebore.
For example, if I try to seat the 120gr Speer Grand Slam out much past 2.815", then I will wind up jamming the bullet hard into the lands and being unable to close the bolt (or force it closed and seat the bullet deeper during chambering). This is true using barrels made by a number of different manufacturers, all of whom use SAAMI spec reamers. Until the heavy-for-caliber VLD designs hit the quarter bore bullet market in force (e.g. 135gr-140gr eVLD) or somebody really wants to pay for a specialty chamber reamer / custom barrel with significantly more leade, I'm not seeing a need to ever worry about 257 Roberts being 'limited' to a 2.8" OAL from a traditional short action.