Catfish,
Not necessarily! Ol'Spark's 338 Tomahawk shoots consistant 1"-1.5" groups at 500 yards. I'm not sure of his particular load or how it does at 100 yards, but I know he's had the same experiences with longer boattails. On some bullets he's gotten better overall groups with the same load at 200 or 300 than 100.
I personally haven't hit that problem yet, but I may with these loads. Still haven't shot them yet, but I'll get to it over the weekend.
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