My post should have said
Its not just a Knight issue either
Rifles that are new out of the box clean shooting are rare by comparison. T/C's Omega was one of the few you could tighten the falling block assembly and possibly tighten the head space a little. Knights and other bolt actions you are stuck shimming or having a custom plug made if you want to use a 209 primer. A few get lucky and a Win209 works fine.