RRM,
So far I am still working on my Swift, but the two loads that have shown the most promise are 36g IMR4895 and 43g H414 both using the 50g VMax bullets. Now these loads are way past starting loads and the H414 load is almost a max load so I would not advise you to start with these, but look at the data for these two powders and I think you might find what your looking for. My next set of loads I am going to try in my Swift will be using Reloader 15, but as of yet I haven't made it back to the range.
Greg