I recently purchased some Arsenal #10 once fired boxer 7.62x39, and reformed it to 6.5 Grendel using a Lee resizing die.. Using starting loads found in the Hogdon and forum reloading tables, I loaded 20 95 gr. A Max, 20 Sierra 100 gr. fmj hp, 20 Hornady 120 gr. A-Max, and 20 140 gr. hornady A-Max. I got the best accuracy from the 95 gr. and 100 gr. bullets, although the 120 and 140 were both within 1.5 MOA. Considering that these were experimental fire forming loads, I was not unhappy with the results.
reloading with 7.62x39 reformed brass
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This practical advice applies to both new native cases, as well as reformed cases. I recently discovered my pre-fireformed loads were shooting at different velocities than the same load in post-fireformed cases. Save yourself some time and trouble and work up your accuracy loads with what you intend to shoot - in this instance, reloaded cases.If it's true that we are here to help others, then what exactly are the others here for?
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I've been using Winchester 7.62x39 brass for "plinking" loads. I fireform them by loading about 2 grains under MINIMUM charge to keep pressure down. I'm getting 1.5" groups with 120 Speer SP's using Benchmark. Just keep the loads WAY down just in case. After they are fireformed you can start working up a heavier load.
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