There's a rule of thumb that for effective and reliable hitting a vital portion of a turkey's head and neck, your pattern should be a minimum of a 100 hits in a 10" circle to establish the maximum range. This varies from gun to gun, load to load. With TSS, the density rate of deterioration is 30% reduction for each additional 10 yards beyond 40 yards. Theoretically, 300 shot into a 10" circle at 40 will be 210 at 50, 147 at 60, 102 at 70, and 70 at 80 yards, etc. I am only the messenger of this and not an advocate of shooting at these ranges. For my use, I don't need or want 300 shot inside the 10" at 40; the downside is a smaller than a baseball pattern at close ranges and slowly opening towards 40. The tightness of HTL patterns leads to misses at close range. It's like a wide bullet and shooting off a bead is chancy for most of us and why more and more users of it use either adjustable rifle sights, scopes or red dots. Gil