40-90BN and paper patch

[Eric Johanen]

Is it possible with the 40-90 BN there is a overbore condition where the case is necked down to an point where the amount of powder is too great for the diameter of the bore? I know that this is possible with some modern smoke less cartridges and they can be a bear to get good accuracy from them. Not a problem with the 44-77 BN or the 44-90 BN as there is a larger bore to deal with the heavier powder charges. Also does not seem to happen with some of the 40-65 chambers or the 40-82 chambers. It does seem the 40-70 and 40-90 Straight cartridges have problems with accuracy. Burning too much powder for the smaller bore.