I have a FA .454 with a twist rate of 1:24, Ruger .454 5 shot with a twist rate of 1:24. Using .454 brass with a 250 gr cast bullet how fast do I have to push it to stabilize the bullet with the 1:24 twist? I guess the whole point of this is I want to use .454 brass at the lowest level that will stabilize the bullet. Powders I have are Unique, H110, H4227 and am using CCI 550 small magnum primers. I have loaded a few .45 Colt loads and shot them in the .454, but they seemed to be lacking in accuracy. Thanks for any info. Brad