Finally got some more info! I guess he has a long throat. To the lands with the 208s, the COA length is 3.131". That doesn't leave enough bullet in the case though, so even at .2xx seated in the cartridge he is reaching out to 3.050" COAL for case capacity. This means he is jumping the 208 AMAX at a distance of ~81 thou. This is probably not normal, but the freebore on Jonathan's rifle is considerable. He's really lucky it shoots so good.gun)
Something else worth mentioning is he ruined a bunch of Win brass at 49g of R17. The load shot well at 1k, but the primer pockets opened up on most of the 49g loads. The primers are too loose for safe use now. I think he's going back to 48.4g as that load shot well also, and will keep an eye out for pressure as the ambient temps increase. It's already in the low to mid 70s here, for now.