If you are talking about Lymans 358429 ( very close to the original Keith bullet for 357's) then yes , they will fit just fine . I have shot a lot of them , crimped in the crimp groove in 19's , 66's , 586 , 686 , 681 etc .
There are folks out there selling molds and folks selling cast bullets supposedly the " Keith bullet " in 357 . I saw several that had the crimp groove raised (which shortens the nose length) to fit more 357's , lowering the case capacity . The Lyman is a very good bullet and the only one I will consider using . The knock offs are just that , " knock offs " and not even close to the original spec's . Some even have a shorter , fat nose . Again trying to accomodate anyones 357 . Those become just a 170 gr swc , nothing more and nothing special about them . If you really want the Keith bullet , 173 gr swc , buy the lyman mold ..........