I have a tc custom shop 24" 32 mag bbl that shoots well with the rcbs 98 swc, lymans 311008, and 311316. It usually stays in 1" to 1.5" at 50 yds. Just for fun i tried the lyman 311414 spitzer over a modest charge of 2400, and wow does this combo shoot! Most groups .6" to 1" depending on exact charge. This will require further investigation, for sure.