Bore has been looked at with several bore scopes by several different smiths.
I have a Badrock rifle in 223/5.56, 1-7” twist. I know who’s barrel it is, you can forget about everything 50 grains and under.
Buddy has a fair number of fast twist .224’s. He has the same results I did. We have both went to 60 grain varmint bullets. The reduced speed and RPM reduction, no problems.
I have seen some guys with the fast twist 6mm bullets have similar issues.
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