If it was made in 1989 it is a M77, not a MKII.
The MKII was introduced in 1991 and the Hawkeye in 2006. Changes to the MKII included opening up the bolt face to allow CRF. (With, I think, various degrees of success.)
Coyote Hunter - NRA Patriot Life, NRA Whittington Center Life, GOA, DAD - and I VOTE!
No, I'm not a Ruger bigot - just an unabashed fan of their revolvers, M77's and #1's.
A good .30-06 is a 99% solution.
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