Shoot a few of those 100 yard matches to get your positions squared away then come out and shoot our full course matches 200-300-600yd at New Holland in the spring.  Here is a link to  our 2015 schedule .

New Holland NRA Highpower Rifle Across the Course Dates

NRA Highpower Rifle NMC classification

This ^ link will show you the percentage breakdown for classification purposes for NRA Highpower.  You will notice the example doesn't show 400 point matches and that is because they are somewhat unconventional and nearly all Across the Course high-power rifle matches are either National Match Course (500 point aggregates) or more commonly Regional Match Course (800 point aggregates)  

Either way, your scores break down to an 88.75% or "Sharpshooter" average.  When you start shooting NRA sponsored matches your scores will be submitted for classification purposes and once you have fired 120 record shots then you will get your first official classification card.  If you fired 88.75% as an average for those first 120 record rounds you would receive a Sharpshooter classification card from the NRA.  As you continue to shoot your scores are sent in and your averages recalculated every 240 record shots (Three 800 agg matches fulfill that requirement)   As your skill level progresses so should your scores and you work your way up the classification ladder.

There are of course Service Rifle only awards too like the Distinguished Rifleman's Badge, earned in Excellence In Competition matches (500 agg matches fired full course with no sighters).  And the President's 100 award, which can only be won at the National Matches at Camp Perry.  There are also a number of other National Trophies for individuals and teams at the Nationals that are Service Rifle only.