Burn-rate charts are only an approximation, partly due to the different ways various powders burn at different pressures. Plus, even with the improvements to QL, it is still a computer approximation, nor reality, despite how well it often works.
Have found LT-30 just about perfect in the .222 Remington, which has at least twice the capacity of the .22 Hornet.
The only slightly slower-burning powder than Li'l Gun I've found to work well in the .22 Hornet is Alliant 3100. Even CFE300BLK is a little too slow, though it works well in the K-Hornet and, especially, the .17 Hornet.
