Thread: Supressor Fitted - major change to point of impact?

After some advice regarding major change in the point of impact when a supressor is fitted.

I fitted a Gunworks supressor to a rifle which is zeroed 1" high at 100 metres. The point of impact holds the vertical alignment pretty much the same, however, the pint of impact has dropped 3" lower.

I've never encountered such a major variance previously.

Any suggestions or comments would be appreciated