Those loads are for International Trap & Skeet, at 1,325 fps. Lots of similar shells are available now, by Rio, Bornaghi, Fiocchi, Challenger, Aguila & other European makers.
Recoil is substantially greater IMHO than 7/8 oz. at < 1200 fps (B&P and others) and Winchester isn't sharing the pressure.

The B&P International 24gm is 1330 at 8,426 psi
Comp 1 24gm is 1160 fps at 5,804 psi and a much better choice for a vintage double.

https://sites.google.com/a/damascusknowledge.com/www/home