Now if it has a 7 3/8" barrel that IS odd. Or did you mean 8 3/8" which is fairly common.
Revolver barrels are supposed to be measured from the muzzle to the forcing cone (i.e. the extreme back end of the barrel by the cylinder), NOT from the muzzle to the barrel-frame interface.
Gumm38: Non-enthusiasts frequently get this wrong and under-report barrel lenghts by 3/4"-1", don't be embarrassed, you're not the first.