I probably shouldn't have put the slip fit stuff into my post.   I have black powder on the brain as that's almost all I use, and my post was really more applicable to that style of shooting.  I don't know if it's even practical with most smokeless powders. 

Chris.

Our club and one nearby shoot the same offhand single shot gong matches, one CF One rf per month each. Our club alone we had almost 900 shooter days in 2013. Top notch competition several national champions and master class shooters from other disciplines. Match has been run one club or the nearly 40 years

Minute of gong our matches means bullet strike and call have to match.  Most shooters can resolve good iron sights to one minute of angle.  2 moa rifle is a disadvantage. Winners need a 1 1/2 moa gun miminum. Come to the line in squads shoot in turn no delays. About the only thing you have time for other than load and shoot is a quick wipe.
  
Complicated loading like breech seating in Schutezen will get you another half minute and divert attention from the job at hand. Hitting the gong.

No doubt Breech is essential in bench matches. Most offhand matches it's a handicap. Takes unlimited time and ability to wait out conditions to make it pay. Even so you can often miss a good condition loading slow.

Boats