It sounds like the older reamers might have been set up with the shoulder at 32 degrees like in the pic below, that Norma case looks like it has a .416 Remington shoulder!! I had my dies custom made in Oz back in '92 but lost contact with the old smith. I only use Winchester .458 brass run through my neck sizer & fireformed using almost full power loads. I trim them to minimum length after first firing as a few end up with slightly uneven necks. I have plenty of cases fired 5 times but probably lose 2.0% each firing. Don't get caught up in the fireforming process mate just size & fire as the case headspaces on the belt. Some of my best bulls were decked using forming loads. My max H4895 load with 410gn Woodleigh is 74.0gns for 2410fps & I use 70.0 gns to form at about 2280-2300fps, these kill very well! I have lots of data with Varget & H4895, IMR4320 shows more pressure & less velocity than these two with the heavier pills!