yellowfin Posted February 21, 2017 Share Posted February 21, 2017 What different lengths of jump to the lands do you guys test at when developing precisions loads? (e.g. .10, .050, .025?) I'll be loading for a .30-06, 195 and 208gr Hornady if that makes a difference in your answer. Just about to order an OAL gauge and never used one before but gather that I should. Do you do test loads in varying lengths before or after dialing in with a powder selection and charge? Link to comment Share on other sites More sharing options...
tcoz Posted February 21, 2017 Share Posted February 21, 2017 Always find your powder charge first and then work with the seating depth. You mentioned an OAL gauge so I'm assuming that you already have a bullet comparator since ogive to base is the dimension that you're concerned with, and not tip to base. Most everything that I've read advises starting at .030-.040 off the lands and working in either or both directions from there in .005-.010 increments. If your rifle is a Remington, you might not be able to load long enough to get that close to the lands as they have long chambers. Link to comment Share on other sites More sharing options...
yellowfin Posted February 21, 2017 Author Share Posted February 21, 2017 (edited) It is a 700 but it's a Douglas barrel finished with a pull through reamer. Wow-- the listed load data from Hodgdon says 3.220 and my max length allowed by the mag is 3.710. Looks like this is definitely something I need to measure! Edited February 22, 2017 by yellowfin Link to comment Share on other sites More sharing options...
tcoz Posted February 21, 2017 Share Posted February 21, 2017 Based on your barrel I would probably start at .030 and load up and down in a single .010 increment. Whichever yields a group tightening, I would continue in that direction in .005 increments until they spread and stop there. I wouldn't bother going in the other direction. you may not see a tightening in either direction in which case I would leave it at .030 where you started. Link to comment Share on other sites More sharing options...
yellowfin Posted February 22, 2017 Author Share Posted February 22, 2017 Mag length should be a piece of cake, got over .450 to spare on that. I have Hornady dies that I like and I see that they offer a micrometer seater to add on. Any particular deficiency of that versus Redding or similar? Link to comment Share on other sites More sharing options...
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