What's the land height on that 91/30? That can have a great deal of effect on the accuracy with several size bullets that the rifle could conceivably fire.
I have one 91/30 with a land diameter of .309 so .308s tumble like a mother out of that gun. The other has .307 diameter lands so .308 jacketed shoots true. I cast .312, size and gas check to .311 and both rifles shoot those very well. I also use the .310 123gr Hornady SPs for a "stinger" load with good results.
Any way you slice it, a 91/30 can be a really fantastic long range rifle with the right load.
