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Rifles, Reloading, Optics, Equipment
Reloading
Ladder test fail. Stop telling newbs to use advanced techniques.
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<blockquote data-quote="Tyler Kee" data-source="post: 1501898" data-attributes="member: 107051"><p>I've always felt that Berger's seating depth test is sort of a mandatory starting point for load development in a precision rifle. Barring that, working off whatever the bullet manufacturer suggests with the help of an OAL gauge. ex: Barnes says .050" off the lands. </p><p></p><p>From there, I always load up a dozen or more rounds at different charge weights (.2 or .3 gr increments depending on case volume) and run it over the chrono until I start seeing signs of pressure on the primer. This gives me a good little graph in Excel so I can look for flat spots in the velocity curve, a decent amount of fireformed brass, and the upper boundary I can work within. </p><p></p><p>From there, it's **** or get off the pot time. Did I get the velocity i was looking for? Is there a big flat spot in velocity over the span of a grain or so? Did the Berger test show me that seating depth doesn't matter? Or that it matters a lot? If it all looks good, I'll load up 10 rounds in the middle of that velocity node and then go shoot it for groups (preferably 250+ yards) and velocity. </p><p></p><p>Wam. Done.</p></blockquote><p></p>
[QUOTE="Tyler Kee, post: 1501898, member: 107051"] I've always felt that Berger's seating depth test is sort of a mandatory starting point for load development in a precision rifle. Barring that, working off whatever the bullet manufacturer suggests with the help of an OAL gauge. ex: Barnes says .050" off the lands. From there, I always load up a dozen or more rounds at different charge weights (.2 or .3 gr increments depending on case volume) and run it over the chrono until I start seeing signs of pressure on the primer. This gives me a good little graph in Excel so I can look for flat spots in the velocity curve, a decent amount of fireformed brass, and the upper boundary I can work within. From there, it's **** or get off the pot time. Did I get the velocity i was looking for? Is there a big flat spot in velocity over the span of a grain or so? Did the Berger test show me that seating depth doesn't matter? Or that it matters a lot? If it all looks good, I'll load up 10 rounds in the middle of that velocity node and then go shoot it for groups (preferably 250+ yards) and velocity. Wam. Done. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Ladder test fail. Stop telling newbs to use advanced techniques.
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