Just this week I had occasion to compare my example of the 1903 MS with a friend's recent acquisition, and hand-loaded some cartridges for him in leu of his dies and reloading components arriving.

Shane's example needed a "bump" to feed the 160gr RNs from the magazine into the chamber, whereas mine was slick. Close examination revealed that mine had an angled feed-ramp, whereas his was hardly ramped at all. The nose of the bullet was virtually jamming against the near-vertical ramp before the magazine and action-rails released the cartridge.

We didn't try different seating depths, but crimped into the cannelure on the 160gr Hornady bullet.

My friend has undertaken to live with the "bump" for now, knowing that some feed ramp adjustment might be needed in the foreseeable future if it gives him the sh!ts...

Just sayin'...