The 91/30 was designed to be shot with the bayonet attach,so the barrel rose when you shot it without the bayonet attached.More then likely they are using 147 grain bullets.In case your wondering - I have 2 of these rifles, and one is a unissued snipe with Russian optics and with 147 Russian...
Two things- get a none computer carb-Quadratech and Red Line make progessive webers for it ,and get a distributor out of a 74,recurve it with the lite weights and set it up wit a GM hei ignition conversion.It will pull like no tomorrow.
Ther are links on the web for the gm hei conversion-A! Cardone makes a electronic vacum advance distributor for 74-80 225.Just make sure the air gap is .005 so you have 300mv a/c cranking and it will trip the gm module.Any 4 pin module will work,just heat sink it-as far as coil its whatevry y...
@meskens93 That was a 7.62-30-06 or 308