These old rounds,

[CDONA]

Left over from my dad's stuff,
The red is a Peeters, plastic treated paper. low base.
Green, Remington, "Nitro Express", not quite a 3" magnum, still high base, with a load of #6 shot ?
A halfway bump up, in performance ?

 

[jao]

I've shot some nitro expess in the past. They had some good velocity, a very noticeable difference from the more recent 12 gauge slugs and buckshot I've shot.

I had more fun shooting them with people who had never shot them before. I used up what I had left years ago, but had fun doing it.

 

[ST Guy]

Some people collect old ammo. I’d try to find a forum that’s related.

 

[CDONA]

I have a matching old double, stamped Nitro Express, my dad's bird gun.
Just wondering, 50's tech, a different mix of powders, then.

Thanks, for this