I'm looking for some info on an Arisaka conversion that my son just bought. (My son didn't say what he paid but it wasn't much) It has been stamped 6.5 x .257 on the barrel (added to the original markings). He was told it was converted from the original chambering and that the previous owners simply used 257 Roberts cartridges in it. Apparently those are supposed to be fireformed and then loaded with 6.5 bullets but the previous owner didn't bother and used 257 Roberts cartridges only. Actually the rifle looks like it's in good shape but it has obviously been converted and sporterized = by a semi professional I think. The cartridges will not feed from the left side of the magazine but work fine from the right. (He was given 3 cartridges with it so he tried the function but didn't shoot it yet) So I'm hoping someone has some info on it and how to go about loading cartridges? Or if the thing should even be considered safe to shoot?