Thanks Nevada Ed, for the examples. If you look at bullet #1 and bullet #3 (assuming they are the same grain weight), I would tend to use the same load data and crimp to the cannelure of each as long as I was not below the minimum OAL. Bullet #3 would fill the casing a fair amount more than bullet #1. That would change the performance relative to the load data. But the real question is, "Does the reduction in case volume for bullet #3 cause a significant increase in pressure so I am wrong in using the same laod data for both bullets?"