Do I need to remove any of the bolt head components, i.e., ejector, extractor, or firing pin, when using the go and no go gauges to check headspace? If not, should the rim of the gauge be held captive by the bolt like the rim of a cartridge would be? My PTG go gauge does not catch by the rim at all and the no gauge only catches on one side? Just trying to figure out if the gauges are defective or if they are supposed to work this way. Sorry for the newbie question. Thanks.