Hi - My impression of the pure gold game cartridges are that they are quite high performance. The catalogue doesn't list a pressure or speed but I don't think I would want to put them through my damscus barrels. I am sure she would take it as she has been nitro proofed to above that but I feel you have to treat these old ladies with respect and don't abuse them. They are old guns and punishing them is going to shorten their lives as it will put stress on all sorts of parts. Use a soft cartridge - point it in the right place and enjoy seeing the birds tumble out of the sky!
John