Is the Stoney Point Comparator worth it to buy. I want a better way to measure the OAL of completed cases. I hear measuring from the Ogive will yeild better results, especially for round noses where there is so much lead exposed. To measure the Overall Length of completed cases, is this all i need? I dont want the find the OAL for my chamber yet, i only want a better way of measuring finished rounds. http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=709931 and http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=377797 thanks.