The Barnes Buster in 44cal (300gr) is in the same boat. They don't say anything, but then you buy the box and its plastered with 1:20" twist. Emailed them as I have an older 444Marlin and was advised the twist warning will remain until they 'cold weather' test ... then it'll come off.
I suppose I should load 'em and try them!
Cheers...
Con
