I have a K1, but am not familiar with the designation KR1, nor can I find it in my Merkel catalog or on their U.S,. distributor's website.

My K1 is a .308 Winchester, purchased a couple of years ago at Briley's in Houston. It shoots 3/4" or less with the handload I mostly use (150 Nosler AccuBond and 46.5 Varget) or Federal factories with the 150 Ballistic Tip.

JB

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