For my Stag Model 4 rifle (ie a service grade 20inch barrel) the 77gr TMK was comfortably under 3/4inch at around max load and is the most accurate load I have developed so far. Once above max load I was getting some vertical stinging of about 25mm but horizontally 10~12mm I assume as my barrel isnt FF. I have tried some retail ammo incl 77gr and that didnt shine at all, seemed too slow to do well. Except for the ADI 69gr SMK that was the second best ammo at about 3/4moa but its expensive.. The disadvantage of the SMK/TMK certainly is the cost v say ADI FMJs which only do 1 1/4moa but are about 20cents or so each.
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