Well nothing beats using the best tools , I found using a Go Gauge with shims and a stripped bolt I can get a exact measurement from bolt face the a shoulder datum , checking with a RCBS Precision Mic . Good tool to measure case gap ( headspace) and bolt face to ogive setting . Some like trying different ways and passing on what works , may help someone without spending money on tools . I don't see this as BS just passing around ways to try . No harm in trying .