BowerR64 said:Usually you dont have a bore light on hand but if you can remove the cylinder you can use white paper or hold it up to the light enough to see the twist.
I find using the corner of a sheet of paper can reflect enough light to see down it.
Another thing i think is important is deep rifeling i think when its deep it shoots good longer with the fouling. Thin rifeling fouls up quick then accuracy starts to fade.