Just investigated a bit on my seating issue... with this bullet, I found that when sizing with RCBS die it is a tighter seating but with Hornady(I normally use now) die it is improved but still snug.
So thinking on mine, perhaps these RCBS dies were built when 475 Linebaugh was still a wildcat with slightly different dims, remember building a few out of 45/70 cases a long time ago, and turned the rims too. Now have Hndy, Starline/BuffBore cases in stock.
Now need to figure out why WFN is a tighter fit in chamber. However, with RCBS die, if ever need a extra tight neck this may be a good way to go.... full length size with HORNADY die, then neck size with RCBS?
Had been using Hndy more because of taper to roll crimp(at end).
Have not cast my own yet, BTW but do have a few moulds and buckets of lead... need to acquire some more too.