I shoot almost entirely old German or Swedish hammer doubles with 65 or 67 mm chambers (commonly called "2 1/2 inch" in English) and fluid steel barrels, guns weighing 6-7 lbs. For hunting, I use typical European and British hunting loads, factory and reloads, with 1,0 oz of shot at about 1300 fps and chamber pressures per CIP standards, which is well above 7.000 psi.
NEVER have I seen any warning against this, other than standard "use only in guns in good condition, intended for these ammos". These ammos have been around since at least 1890s and some of my old guns have been heavily used and repaired, common for European hunting guns, while others seem to be totally original (especially two apparently from hunt clubs). One can only suppose that such factory loads were the ammo used.
I would expect that Parkers and Francottes would perform as well, perhaps the Foxes and Smiths too.
Niklas
