Boy-Oh-Boy Someone did a number on this 1903

[enbloc8]

That's not a 1910 serial number for a Rock Island...more like a very late production rifle, 1918-19. That it has a 1928 barrel is curious as well...possibly the receiver was sent along as parts to Springfield and later completed there?

I also noticed the lack of a weld or grind-marks on the cutoff...and notice the claw is missing from the extractor?

Again, it sounds to me like an overloaded round vented and sent molten brass everywhere. Even if the bolt can be removed (intact or in pieces), I'd say check the receiver and barrel for any signs of stress or cracks.

PS - Something I noticed just now. Look at both sides of the receiver ring...there's no gas vent holes at all, neither a Hatcher hole on the left nor the inadequate original hole on the right that was supposed to vent through the extractor. How did that receiver get out of the factory??