Extensive group testing session today with a variety of 6.5cm ammo in my NRL hunter rifle (bravo d18 rs1.2)
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Each group was 10 rounds, fired as fast as I could run down to 100 yards and mark. Groups did open over time, though this may have more to do with mirage off the Scythe ti than system heat more broadly.
Didn't expect this cheap Winchester Deer season to put up such a tight group:
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140 SMK did predictably well:
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140 ELD-M in 1.1":
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143 ELD-X struggled a bit:
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147 ELD-M shot just under an inch:
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A while ago I bought a big stash of Norma Golden Target, a .635 G1 143 grain match load. I'm generally able to get sub-minute groups out of it, so I think the mirage or system heat was starting to overwhelm me here. Still not the disaster like most hunters would expect after 50 rounds in half an hour:
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Let's finish off with a group from my .223 in a hogged out factory stock, which was 10% bigger than the groups it was shooting in my Alterra or Wildcat:
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None of this is data (yet), and I'm happy with all of these groups. Hope it's helpful to someone.
-J