On rare occasions there can be a delay in igniting the primer, so wait at least 20 seconds before opening the bolt and ejecting the cartridge. Check that the bullet is still attached to the cartridge case — if not, check it is not stuck in your barrel. If complete, try reloading the cartridge as a sighting shot, rotating it to enable striking a different point on the rim. If it still does not fire, please seek advice from your local supplier.