The Savage SAAMI pressure is 45,000 CUP the Roberts 54,000 PSI and the +P is at 58,000 PSI. This is why the 257AI shows more improvement then some others as the parent cartridge is at a lower pressure. You would see the same level of improvement with the 250-3000AI or 25 Creedmoor.

They are all in about the same niche, and all are great deer cartridges. No need to stomp on these to get them to perform. If you want more velocity there is the 25-06 and 257 Weatherby.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli