1903 bolts

[Rick the Librarian]

Hello guys. Looking for some help getting some history on a few bolts
1-bolt shoulder marked BF over 46, A on underside
2 -bolt shoulder marked R 4 safety marked R - assuming Remmington, but what is the 4
3 -bolt underside marked R, extractor marked cc4 -bolt underside marked R safety marked R
5 -bolt shoulder marked B&S (brown and sharp?) over 8

Thanks guys!

All are WWII replacement M1903 bolts except for #3

BF - Bonney Forge - finished at Springfield, WWII

B&S - Brown & Sharpe, as above

R - Remington - could be original and, depending on when it was made, either for a Remington M1903 or M1903A3