I have been looking for a cut rifled barrel blank in 22cal for a short 22ppc. The only thing I can find in stock is a 13 twist bartlein. I pretty sure ill be fine here as I am shooting a 52 grain bullet. I just thought I would see if anyone here had any ill experience with a 13 twist 22cal before I bought the blank. I know most use 14 twist and some even a 15 twist. I don't know of anyone that has used a 13 twist. I just don't want it to be to fast. Lee