I have a Italian 45-70 Sharps and was measuring the chamber length and found it longer than a normal 45-70 OAL. Supposedly the OAl for a 45-70 is 2.55 but in measuring mine it comes out to be 2.80.Thats measuring from the breech block closed to the muzzle,then putting a bullet only until it touches the rifling and then measuring that with a measurement of 2.80.Should I be leaving the bullets out more,now I am seating them to the front lube ring but that still leaves a lot of space.Will that difference affect accuracy? I am currently using 70 grains Black,fiber wad and a 500 grain bullet.Maybe a 535 bullet? Any suggestions.