Please reduce the size of your pictures.
Key holing is caused by undersized bullets, oversized barrel or sometimes too low velocity. A lack of lube on cast bullets will do it too. It has nothing whatever to do with the rifling twist. Especially at excessively short range. A bad crown won't either. That'd just have really bad accuracy.
You can't disguise a .444 barrel by stamping it wrong. A .444 barrel is way bigger than a .358 barrel. You'd notice a .30 cal vs .35 too.
Key holing is caused by undersized bullets, oversized barrel or sometimes too low velocity. A lack of lube on cast bullets will do it too. It has nothing whatever to do with the rifling twist. Especially at excessively short range. A bad crown won't either. That'd just have really bad accuracy.
You can't disguise a .444 barrel by stamping it wrong. A .444 barrel is way bigger than a .358 barrel. You'd notice a .30 cal vs .35 too.