still need help with 1903 Remington bolt id

[kicker]

Sorry, but i still need some guidance regarding the correct bolt for a 4/42 Remington 1903, When did Remington switch from what they call a early 03 bolt to the late 03 early 03A3 bolt. What is the key feature in indentifying each, It what time periods were each of the 3 different firing pins used?

thanks again for all your help,
scott

[John Beard]

See reply to earlier posting.

J.B.