Load No. RAX16-7 1/2 was a box of 16-gauge, 2 3/4-inch, shells with the "New Remington Crimp" loaded with 3 1/4 drams equiv. of progressive burning smokeless powder, pushing 1 1/8-ounce of #7 1/2 shot.

Beginning in mid-1947, with the introduction of the "New Remington Crimp" on the Remington Express shells, Remington offered three 16-gauge Remington Express loads.

RX16 a 2 3/4-inch shell with 3 drams equiv. of progressive burning smokeless powder, pushing 1 1/8-ounce of shot, with the "New Remington Crimp."

[Linked Image from i.imgur.com]

RAX16 a 2 3/4-inch shell with 3 1/4 drams equiv. of progressive burning smokeless powder, pushing 1 1/8-ounce of shot, with the "New Remington Crimp."

[Linked Image from i.imgur.com]

RX16S a 2 9/16-inch shell with 3 drams equiv. of progressive burning smokeless powder, pushing 1 1/8-ounce of shot, with a rolled Crimp.

I don't have a picture of these.

In the December 1954 they added a fourth --

RX16CMag a 2 3/4-inch shell with 3 1/2 drams equiv. of progressive burning smokeless powder, pushing 1 1/4-ounce of shot, with the "New Remington Crimp."

[Linked Image from i.imgur.com]