The breech plug shown being made is still 'new', but this one i used yesterday, and the day before, is very nearly the same; like within 0.003". The group is 5 shots. The range was 102 yard, and it was shot from the cabin of my pick-up. The Accura has a peep sight, and i am gettin' ready for our muzzle loader season. Bullet is 300g Gold Dot.