Bob Wright
Well-Known Member
8.5 twist.Bob, what is the twist on your 7mm RM? Marginal stability could have them opening more than expected, but that is a big increase.
The 180 Bergers shoot excellent to 1000. I tried the 175 Nosler and it was a huge UGLY surprise 7-8" lower than predicted with Strelok. With 168 SMK they are ragged holes at 100 with just a bottom end powder load that I did a quick test with.
I could have a bad batch of Noslers and an incorrect BC. Don't know if I'm continuing on with it.
Top pic is 200 sight in, cold clean, then 2 touching
Cardboard target drop test with 200 yard zero. 600 yard shots. The drops in inches included.
The left group is 5 rounds of 168 SMK'S at 100 just checking a bottom end charge of RE23 at 2850 fps.
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