Reading a Williams "How to Convert Military Rifles" Booklet it states that no M1903 made before 800,000 should be fired with any ammo reaching 50,000PSI due to the heat treatment of the receiver.

I ask because mine has been used as a sporter for a very long time and I assume using factory ammo with no apparent problems.

I like it is a WW I era rifle and would like to be able to shoot it even if with slightly reduced loads. While trying to restore it.
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