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Message: <blockquote data-quote="Batsin" data-source="post: 2971375" data-attributes="member: 126867">The WSM series of cartridges was one of the last to use the old single-taper chamber design (as opposed to having a section of snug freebore to assure bullet alignment prior to rifling engagement).  Remington had switched to using freebore by the early 1960's and the RSAUM series has it.  The 6.8 Western follows this design as well.   Hornady engineers have stated that a section of .1" or more of snug freebore helps with average accuracy and makes the rifle less picky as to which loads it likes.I have wondered if people have found SAAMI-chambered WSM's (and Winchester Magnums, in general) to be noticeably more finicky than the Remington and Hornady magnums and short-magnums?  Thanks</blockquote>