powerbelts are certainly not the problem, ive fired them with bh209 a solid 9,000 times over the past 2 years, a great deal of those shots on stock cva breech plugs.
some of the knights breech plugs are iffy, some work fine, others are a lot more sensitive.
Knight sells the bare primer conversion and i'd call knight and if you have any trouble, ask to speak with someone else.
