I think that just about everyone, including me, would recommend RST low pressure loads in a 94 year old gun. Generally, it is not the metal that people worry about in guns of this age, it's the head of a 94 year old stock. Walnut, or for that matter any wood, of that age tends to become more brittle as it ages. If it is oil soaked, that makes the situation that much worse. Most would say to be gentle with that old wood. The load that you mention on the surface appears to be a lighter load with reasonable velocity, however, its psi is probably up around 10,000 psi or more. Remember, it's not the velocity but rather the pressure per square inch that the load generates that fractures that old stock wood in the head or wrist of the stock.
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