In my Ruger BHK .45 Colt I have done comparisons (same powder charge) the Lee 252 SWC & a Lyman 452424 Keith. Both are quite accurate. I find that the Lee bullet is always faster than the Keith, using the same powder charge. I favor the Lee version because I find it easier to cast w/ a Lee bullet mold vs a Lyman (it's lighter). The Lyman mold takes longer to cool; I can cast faster w/ the Lee mold. Was wondering what others think of these two bullets?