I have 400 and 385 grain gas check bullets on order and cannot finds loading data specifically for cast bullets. Should I use data for jacketed bullets at about 2000fps? I have 4895, 4064 and 4831 powders.

TIA

Roger Q.

Look at data for xmp-5744 by Accurate arms. I think their brochure and web site have data for the 416's. Don't remember if its rigby or Rem. You can give a call to their tech support and see fi they cna help.