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Rifles, Reloading, Optics, Equipment
Reloading
Help a gal with load development-seating depth
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<blockquote data-quote="codyadams" data-source="post: 1743569" data-attributes="member: 87243"><p>That is what I do. My load developement for best precision goes something like this.....</p><p></p><p>Coarse max pressure test:</p><p>1 round at each charge, usually moving up in 1 grain increments, half grain if case capacity is under 45 grains or so. I load up to where I know I should be over max with my high load, and plan on bulling a bullet or two. This is only to find my max pressure, and I document my velocity. Takes less than 10 rounds generally, even with wildcat or unknown recipes to find max. Usually done seated .010" off.</p><p></p><p>Coarse seating depth:</p><p>As stated, essentially the "Berger" seating depth test, from .010" off out to .130" off. Done with a load well below max, with no reguard to where nodes are or may be, seating depth should be a big enough difference to tell even outside of the nodes. Once I do my fine seating depth test, this seating depth from the lands will remain the same for this bullet for the life of the barrel, reguardless of other changes in the load.</p><p></p><p>Primer testing:</p><p>Using what I know so far, I load a safe charge at the seating depth I just chose, and figure out which primer gives best accuracy/e.s. of the different primers I have to work with. </p><p></p><p>Ladder testing/fine pressure test: </p><p>Referencing my course max pressure work up, I load up 1 or 2 rounds per charge in .2 or .3 grain increments in the velocity/pressure range I want to be in, usually going across 2-3 grains depending on case capacity. I set up a tall target at 500-600 yards, and shoot my rounds, documenting the impacts. The results of the ladder test tell me where my best load is going to be. </p><p></p><p>Fine seating depth test: </p><p>Depending on what your seeing and your expectations/requirements you may not need to do this part, but using my info I have gathered thus far, I go up and down in .005" increments, up and down .020" covering a range of .040". I shoot for groups and pick the best one.</p><p></p><p>After this, I am done. I tweak these depending on many things, but if I want the most possible out of a rifle, this is the route I go.</p></blockquote><p></p>
[QUOTE="codyadams, post: 1743569, member: 87243"] That is what I do. My load developement for best precision goes something like this..... Coarse max pressure test: 1 round at each charge, usually moving up in 1 grain increments, half grain if case capacity is under 45 grains or so. I load up to where I know I should be over max with my high load, and plan on bulling a bullet or two. This is only to find my max pressure, and I document my velocity. Takes less than 10 rounds generally, even with wildcat or unknown recipes to find max. Usually done seated .010" off. Coarse seating depth: As stated, essentially the "Berger" seating depth test, from .010" off out to .130" off. Done with a load well below max, with no reguard to where nodes are or may be, seating depth should be a big enough difference to tell even outside of the nodes. Once I do my fine seating depth test, this seating depth from the lands will remain the same for this bullet for the life of the barrel, reguardless of other changes in the load. Primer testing: Using what I know so far, I load a safe charge at the seating depth I just chose, and figure out which primer gives best accuracy/e.s. of the different primers I have to work with. Ladder testing/fine pressure test: Referencing my course max pressure work up, I load up 1 or 2 rounds per charge in .2 or .3 grain increments in the velocity/pressure range I want to be in, usually going across 2-3 grains depending on case capacity. I set up a tall target at 500-600 yards, and shoot my rounds, documenting the impacts. The results of the ladder test tell me where my best load is going to be. Fine seating depth test: Depending on what your seeing and your expectations/requirements you may not need to do this part, but using my info I have gathered thus far, I go up and down in .005" increments, up and down .020" covering a range of .040". I shoot for groups and pick the best one. After this, I am done. I tweak these depending on many things, but if I want the most possible out of a rifle, this is the route I go. [/QUOTE]
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Help a gal with load development-seating depth
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