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Message: <blockquote data-quote="Dumpstick" data-source="post: 3336599" data-attributes="member: 41653">[USER=45455]@OKBPS[/USER]Let me give an example of what I did with some PPU factory 7.62x54r.  This is 150gr, standard ammo.  I only fired 5 round groups, just as a test, but it will give you an idea. I pulled down 20 rounds.-Powder charge was avg at 51.0gr, but varied as much as 2.5gr. Powder at 51gr filled the case to the bottom of the neck.-Bullet weight was remarkably consistent, avg was 148.88gr-bullet diameter was very consistent at .3116 I dropped the powder charge in stages, looking for ignition anomalies.I resized the necks, and reassembled the ammo to factory length, and crimped with a Lee Collet Crimp, as the factory ammo was also crimped. fired over a chrono:51.0gr - Vel 2868, ES 49,  SD 23.148.0gr - Vel 2555,  ES 3,  SD  1.5    (WOW!!!)45.0gr - Vel 2438,  ES 46,  SD 20.342.5gr - Vel 2324,  ES 56,  SD 21.3As you can see, I reduced the powder charge a bit over 15%, and had no ignition problems.  The spread is comparable to factory.  Accuracy was best in my rifle with the 42.5gr, but yours may be different. I see no problems with the example I gave. I've done this with other ammo with similar results.  If you drop the charge below 80% of factory, I would recommend a small tuft of Dacron fill to keep the powder back against the primer. I have a load I'm testing in my M39 with cast lead: 26.0 - 28.5gr IMR 4895 with a ~.75gr tuft of Dacron loosely pushed in the case. It's well below load-book data, but I have no ignition inconsistencies.  This load is down around the 60% of recommended, an issue you touched on in your above reply.</blockquote>

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