I have a no name Drilling circa 1925 with a 9.3x72R rifle barrel.

The lands are only .047 wide and the grooves are .147, six lands and grooves. The lands are very tall at nearly .010. The diameter between the grooves is .364 and the diameter between the lands is .3445

Can anyone give me some info on this barrel, type of bullet etc? Are these tall narrow lands common? How would you load for it?

After the first shot the rest are just noise.