eldermike, note that places first down through tenth are the smallest 10 groups or aggregates shot. All the others are bigger. At the next match, those top ten may well place one-third down the way on the scoreboard.
People have been shooting 20 to 40 shot strings without cleaning their barrels and no accuracy fall off whatsoever is observed over decades of doing this. When I toured Sierra Bullets' plant in California years ago, the ballistic tech said he shot 10-shot test groups of production run bullets about 10 to 15 minutes apart. He'd grab 10 as they came out of the pointing machine (at about 80 per minute), seated them in primed and charged cases then shot 'em in rail guns. Good lots of 30 caliber match bullets would shoot in the ones group after group after group in their indoor 100 yard range. Never cleaned the match grade barrel between groups testing a production run of several thousand bullets.
People have been shooting 20 to 40 shot strings without cleaning their barrels and no accuracy fall off whatsoever is observed over decades of doing this. When I toured Sierra Bullets' plant in California years ago, the ballistic tech said he shot 10-shot test groups of production run bullets about 10 to 15 minutes apart. He'd grab 10 as they came out of the pointing machine (at about 80 per minute), seated them in primed and charged cases then shot 'em in rail guns. Good lots of 30 caliber match bullets would shoot in the ones group after group after group in their indoor 100 yard range. Never cleaned the match grade barrel between groups testing a production run of several thousand bullets.