Questions for those who are experienced with the Hornady OAL case guage. I have reloaded many a round but just recently purchased this gauge, primarily for use in my 6.5x55mm rifles, one a mauser and one a Ruger. After using several bullets in each rifle and taking measurements I have found the guage will give various measurements for any given bullet. Measurements varied by as much as .015. This could be due to the lead tipped bullets varying in length right out of the box. But...I ensured my technique was repeatable each time taking caution not to vary the tightening of the tension on the screw on the ram, and so forth. I did not use a dowel rod, however, since I don't currently have one but will get one. I could see where this would help to "feel" the bullet touch or stick to the rifling.
Question 1: have any of you had measurements vary by this much?
Question 2: do you always use a dowel rod?
Question 3: what is a good technique or way to measure bullets with lead tips which are not uniform in length?
Question 4: Any other gouge wrt using this tool?
Thank you in advance for your input!