1972RedNeck
New member
257 STW is an 8mm REM necked to 257. 258 Condor is basically an improved 375 H&H necked to .257.
Same cartridge, different name?
Same cartridge, different name?
The 257 condor appears to be derived from 300 win mag and is significantly shorter in case length at about 2.4" and max case capacity of 78 grs.
I guess it really depends on what you want to do with it but I can't see much point in going huge overbore on a 257 unless you really see match potential or really have a thing for picking off small game at extreme range.