does anybody know of a source for 600 gn, .458 gas checked bullets? my 458 with 450 gners, seated on the gc will not touch the rifling. just thought it would be easier than trying to make a throat mold with cerro-safe, or other mixtures. thanks halfbreed
Try the NEI handtools sight. They list several up to 645 gr. They also show a design specifically for the Winchester Magnum chamber. I use an RCBS paper patch 550 gr in a 458 WM. I also have a Saeco 540 gr mould that works well. Both feed from the magazine and the paper patch is surprisingly accurate. I think a bullet that filled the throat would have to be loaded single shot and would not fit in the magazine.
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