[classicioi]

Are the store bought 410 - 2 1/2" - 1/2 oz shells safe to shoot in a mechanically sound vintage 410 SxS ?

I have always shot the RST - 2 1/2" - 1/2 oz shells that are 5000 PSI but haven't been able to find what psig the Winchester, Remington, Federal etc. shells are.

Do you think they would be a lot higher than the RST's ?

Thanks