Tom: Your question raised my curiosity and I checked out the entire chapter pertaining to Sako rifles in "Bolt Action Rifles",expanded 3 rd edition, by Frank deHaas, page 381. Try as I might, I could not find any reference for a S491, unless the receiver is "too new" for the books publication.
The S491 action was introduced August 25, 1992. The action footprint is very similar to it's predecessors the L461 or A1 action. The S491 actions have slightly inferior workmanship compared to the L461 or A1 actions. The S491 is chrome moly and there are no records of actions made in stainless steel. The S491 has a separate recoil lug and a Tikka trigger assembly. The medium length action was the 591, similar to the L479 and All. The long action was the 691, similar to the L61 or Alll. The separate recoil lug is also found on the Sako 75.Couple of questions. Is it stainless? What is it's footprint the same as, for stocking purposes?
I haven't found any useful info on it, including the Sako website.
Thanks, Tom
I have the s491 in single shot and Bix And Andy does make a trigger for that mode and the S591 also. It's a $500.00 trigger.I have a varmint repeater s491. completely different action from the Ai and Aii etc. heavier and bigger. bolts don't interchange. Bix Andy I think makes a replacement trigger. Super nice and heavy. Bix triggers were very expensive, about 4-500 dollars but could be worth it. mine is 243 with typical twist rate of the era.