Hi guys I’m new to the forum so please excuse me if I posting this in the wrong place but I just picked up a smith and Wesson m&p model 1899. I was wondering what caliber were these made in mine is a .38 but is it .38 special or .38 long colt is it safe to shoot modern Ammo in it ? It’s an early production serial number in the 1,500s no roll mark on caliber on barrel from my understanding these were made from 1899 to 1902 this one is in excellent mechanical shape and isn’t bad cosmetically thank you so much for your help