At an FT event this weekend I had the opportunity to ask shooters who shoot at the national level and even a national champion how they practice.
Without prompting from me, they all said they shot paper because paper records your misses and allows you to analyze the shot to determine: Was a bad shot due to;
A. Shot process.
B. Not establishing a good natural point of aim.
C. Read the wind incorrectly.
D. Didn't range correctly.
So I hand loaded the AAFTA Troyer Table into a pivot table and did some comparisons of various Troyer Kill Zone range layouts that would allow you to test your: ranging, wind reading, and marksmanship skills.
The best range layout from the pivot table that tested all these skills with a simple in line range set up is:
A. Take the highest Troyer for each KZ size for Easy, Moderate, Hard, and Expert.
B. This will yield 48 Kill Zones spread over 26 distances as follows: Yardage.Number of Kill Zone Sizes;
11.1, 12.1, 14.3, 17.1, 18.2, 19.2, 22.2, 24.2, 25.1, 26.1, 27.1, 29.3, 31.1, 32.1, 33.1, 34.2, 37.3, 39.2, 41.1, 43.1, 44.2, 45.5, 46.1, 49.1, 53.2, 55.5.
To build the pivot table I used the Central Texas Airgun Club's Troyer PDF. I used only those KZ-Distances allowed for Grand Prix.
The course Troyer for this layout is 31.867 with no environmental modifiers.