I run a 7 Practical with 9 twist running 3100 FPS out of a 30" Krieger. No bullet blow up and have taken game out to 1130 yards. No problems. You don't need a 8 twist for these bullets or any other 7mm bullet in high capacity 7 magnums. Combine an 8 twist with a large magnum and i understand why people are seeing bullets come apart.