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My barrel in the 30BR is a 1/8 twist at 22 inches - built on a Rem 700 in an AICS stock.
Now I have loads using 4198 ranging from 10.5 to 12 grains and a nice subsonic load with 8.5 grains and a rainbow trajectory but I want something that groups firstly at 100 yards and then is accurate to 200.
If I did it over again I would go with the 300 Whisper case over the BR but I had lots of BR brass.
Because of the size of the BR case I think Trail Boss is worth a try. I also want to try some 220 grain SMK - I have some 250 grain SMKs but don't want to use them!
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