scraped means using a scraper to clean the face a flat face breech plug.for match target shooting a build up of crud on the breech face will cause bad things to happen.when shooting 100 grains or more it can really build up deep quickly. spydermatic is the name used by custom barrel maker/builder from mich.he makes top of line match grade target barrels. for chunk shooters his barrels hold almost all the records and shot by most of top shooters . his bead front sight with built in shader also to protect the fine posted bead and rear sight has a small 1/2 circle notch and sight slides along a rail..held in place by set screw,you can set your eye relief over 10 inches -depending on the sky and how you are seeing the sights that day.they are shot by well over half of chunk gun shooters. -his false muzzles bench barrels have been setting new records and winning big at friend ship .his newest babies are the 38 cal for the 13 lb weight board shoots.going to pull my old 17 lb 45 cal flint gun out that don getz made me and give it a try this weekend he called chunk guns x-omatics ,it and spyder mean shooting the center of x out of the target .right now Charlie bowers hold the 10 consectutive shot record of 2.46 inches dave krumme used to hold it with a 2.57 all you have to do is shoot the center of x out around 8 shots out of the 10 at 60 yards using crude non adjustable rear sights.to give you a idea how small the total group hole was 4 practice shots and 10 match shots were comepletely covered by a quarter. this game is for us old !@#$% that cant shoot off hand any moreAand bench rest is to serious. old enysford powder is showing some real promise