The priming tool on the Forster press utilises jaws to hold the case in place, these jaws cannot be opened wide enough to accept the large rim of 470 cases. Also the floorplate of the tool has a narrow gap the case is supposed to slide through to get under the jaws, this too is too narrow. This issue only affects priming. However it should be noted that the jaws holding the case for sizing etc. will not accept 470 case either, one has to use standard shellholder for it. Changing from the floating Forster jaws to the shell holder arrangement requires undoing two hex screws and the press can be converted so in under a minute.
