So ordered two molds from accurate molds, going to make 240 grain bullets no gas checks, and 200 grain with gas checks, have to use 416 gas checks i am told, thinking i need to find a .408 sizer for the .406 bore of these rifles, anyone else work with this caliber?

"The 375HH is the greatest level of power you can get for the investment in recoil." (JJHack)
79s and losttrail, biggest waste of air.