i'd float test them before i pull the plug --- i have gotten too hasty in the past and killed late bloomer chicks--- especially with pheasants. pheasant eggs can be a major pain in the butt! they dont ship well(rarely imo has it been a fertility issue, its usually the jostling of being shipped or how they have been handled. and of course there's always the xray issue, temp during shipping, etc...) , humidity variances seem to wreak havok with them, and i always seem to end up with a low hatch rate from shipped eggs. good luck with them.
ps--- for what its worth some of these guys have the luck of the irish with hatching & raising pheasants and the rest of us make or selves bald and crazed trying to get 1 or 2 out of a dozen hatch, so i really think some folks just have the "knack" for it.