Re: Standard Redding 3-Die or National Match?
I think the Redding NM dies are setup for the Garand (semi-auto), size brass a little smaller than standard dies. I would stick with the Comp. die set for a bolt-action.
Re: 45.8 Varget in a 308 w/ 175 SMK
Try a drop tube when charging cases, I use it when loading .223 with 80gr pills. A Forster Blue Ribbon Powder Funnel with Long Drop Tube works for me.