All listed except the 22-250 are based upon the 308 case (all necked down). The 22-250 shares the same bolt head diameter (.473) but is based on the 250 savage (aka 250-3000) case. If you want a 25 caliber short action cartridge with the standard bolt head, your options are the 250 savage, 257 roberts can work on a short action but full potential wont be realized, or a wildcat based on the 308 case ( i believe it's called the 25 souper). There is also improved versions of both the 250 savage and the 257 roberts.
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