Hello. I hope I'm not asking to much, I am trying to find a serial number of a pre accu trigger that came factory small shank chambered in 300 ultra mag. Im not trying to start a fire but the gal that I talked to at savage tells me that 300 rum was never produced with the small thread action. The guy that emailed me from there told me the same thing. I would like to check there parts finder and see what it says. I would appreciate it please pm me if you would be so kind as to share some info.