Lmao..I also have a very extensive selection of friends that shoot both the 2506a improved and the 257 Roy..you are looking at around 100 to 150 fps difference however you cut it..be it with a 1 in 9 twist and a heavier bullet with more bearing surface or a 100 gr nosler and 1 in 12 twist..they are very similar roeunds..so similar that I don't see the necessity of owning the 257..the 6.5 saum?..I've never even seen one..I know they have the same powder capacity as a 2506 and push 2 to 300 fps faster..at least that's what they say..idk..but for obvious reasons the 264 is the choice of many big game hunters and also varmint plunkers..the 264 is superior to the 257 in that aspect
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