i'm almost alone in this but i believe one of the most significant mistakes silhouette shooters make, especially relatively new shooters, is to use too much magnification. i've been using 6x for about 2 years and have recently graduated to 10x. Most, not all, of the top shooters are right around 20x - 24x. They have paid their dues however. They usually have an extremely solid foundation of classic shooting skills and are at a level where 95% of good match is what goes on in their head. Their stance, hold, breathing, trigger work, and follow-thru are, for the most part, second nature. They also continuously work to improve those skills. as a rule of thumb i'd suggest that if you can't see the bullet impact on your target then you aren't following thru well enough to warrant increasing your magnification. if you watch the movie consistently then more magnification may be a consideration.
dave imas