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Message: <blockquote data-quote="Gus Petch" data-source="post: 2870179" data-attributes="member: 5452">"Jump space" is a term no experienced handloader would ever use. It's simply the bullet seating depth -- the distance between a the bullet ogive and the start of the lands -- and is a function of the barrel's throat length. <a href="http://www.sierrabullets.com/resources/x-ring-newsletter/index.cfm/xid/4/Bullet-Seating-Depth/#seatdepth" target="_blank">X-Ring Newsletter - Sierra Bullets - The Bulletsmiths</a>Once he has established his seating depth -- whether it's 0.010" or 0.015" or 0.005" short of the lands -- it will (in theory) remain constant for any bullet used in the given rifle, provided it can be accommodated in the magazine, too. He is using the same bullet in both sets of his loads and firing through the same rifle, making your suggestion moot.</blockquote>