Anyone else shooting vintage loads?

[jakebird]

I got a partial box of these that has been my wife's grandfather's. He did a little hunting but not very seriously. I'm not sure the age of these shells but I'm guessing 1960s or 70s by the box print. 15/8 ounce 3 inch #6. Shells are in good condition. Stored cool and dry. Naturally, I'm curious how they will pattern through a modern turkey choke. Just waiting for a break in the weather. And PA doesn't open till May 4th this year so I've got plenty of
time for tinkering. If anyone knows a more accurate age on these shells, too I'm curious to know.