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Rifles, Reloading, Optics, Equipment
Reloading
280ai
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<blockquote data-quote="Brambles" data-source="post: 1186480" data-attributes="member: 11508"><p>At the bottom I cut and pasted quick load data I found on another thread............</p><p></p><p>My rifle is a 23 1/8" long lothar Walther barrel </p><p>A 168 hunting vld loaded .006 off the lands is 3.435"</p><p>Federal 215 magnum primers</p><p></p><p>I want to get 2800 fps if I can </p><p></p><p>I have a good selection of the more common powders H4831sc, RL22, H1000, Retumbo, IMR 4350, IMR 7828 (not ssc)</p><p></p><p>I figured Retumbo was my best bet..</p><p></p><p>I loaded 3@63g to play around and a ladder load from 63-66 gr in .3-.4 gr increments...i.e. 63, 63.3, 63.6, 64</p><p></p><p>What do you think about starting load development .006 off the lands? Might show pressure sooner?</p><p></p><p>Should I continue the ladder load past 66gr...???....the powder comes half way up the neck at 66 and is crunching a good bit...the boat tail sits below the neck in the case.</p><p>........................................................................................................</p><p></p><p>Cartridge : .280 Ack Imp</p><p>Bullet : .284, 168, Berger VLD</p><p>Cartridge O.A.L. L6: 3.340 inch or 84.84 mm</p><p>Barrel Length : 24.0 inch or 609.6 mm</p><p>Powder : Hodgdon Retumbo</p><p>Predicted data by increasing and decreasing the given charge,</p><p>incremented in steps of 2.0% of nominal charge.</p><p>CAUTION: Figures exceed maximum and minimum recommended loads !</p><p></p><p>Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time</p><p>% % Grains fps ft.lbs psi psi % ms</p><p></p><p>-20.0 84 50.40 2077 1610 22918 9056 84.9 1.831</p><p>-18.0 86 51.66 2135 1701 24415 9449 86.9 1.785</p><p>-16.0 88 52.92 2194 1796 26019 9832 88.7 1.739</p><p>-14.0 90 54.18 2254 1895 27739 10203 90.4 1.694</p><p>-12.0 92 55.44 2314 1998 29582 10560 92.1 1.650</p><p>-10.0 95 56.70 2375 2105 31560 10899 93.6 1.606</p><p>-08.0 97 57.96 2437 2215 33684 11217 94.9 1.564</p><p>-06.0 99 59.22 2499 2330 35968 11513 96.1 1.522</p><p>-04.0 101 60.48 2561 2447 38423 11782 97.2 1.476</p><p>-02.0 103 61.74 2624 2568 41072 12024 98.1 1.429</p><p>+00.0 105 63.00 2686 2691 43927 12236 98.8 1.383</p><p>+02.0 107 64.26 2748 2818 47012 12416 99.4 1.339</p><p>+04.0 109 65.52 2811 2947 50347 12561 99.8 1.297 ! Near Maximum !</p><p>+06.0 111 66.78 2872 3078 53959 12671 100.0 1.255 ! Near Maximum !</p><p>+08.0 113 68.04 2934 3211 57878 12745 100.0 1.215 ! Near Maximum !</p><p>+10.0 116 69.30 2995 3346 62136 12807 100.0 1.176 !DANGEROUS LOAD-DO NOT USE!</p><p></p><p>Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge</p><p>Data for burning rate increased by 10% relative to nominal value:</p><p>+Ba 105 63.00 2854 3039 54129 11798 100.0 1.261 ! Near Maximum !</p><p>Data for burning rate decreased by 10% relative to nominal value:</p></blockquote><p></p>
[QUOTE="Brambles, post: 1186480, member: 11508"] At the bottom I cut and pasted quick load data I found on another thread............ My rifle is a 23 1/8" long lothar Walther barrel A 168 hunting vld loaded .006 off the lands is 3.435" Federal 215 magnum primers I want to get 2800 fps if I can I have a good selection of the more common powders H4831sc, RL22, H1000, Retumbo, IMR 4350, IMR 7828 (not ssc) I figured Retumbo was my best bet.. I loaded 3@63g to play around and a ladder load from 63-66 gr in .3-.4 gr increments...i.e. 63, 63.3, 63.6, 64 What do you think about starting load development .006 off the lands? Might show pressure sooner? Should I continue the ladder load past 66gr...???....the powder comes half way up the neck at 66 and is crunching a good bit...the boat tail sits below the neck in the case. ........................................................................................................ Cartridge : .280 Ack Imp Bullet : .284, 168, Berger VLD Cartridge O.A.L. L6: 3.340 inch or 84.84 mm Barrel Length : 24.0 inch or 609.6 mm Powder : Hodgdon Retumbo Predicted data by increasing and decreasing the given charge, incremented in steps of 2.0% of nominal charge. CAUTION: Figures exceed maximum and minimum recommended loads ! Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time % % Grains fps ft.lbs psi psi % ms -20.0 84 50.40 2077 1610 22918 9056 84.9 1.831 -18.0 86 51.66 2135 1701 24415 9449 86.9 1.785 -16.0 88 52.92 2194 1796 26019 9832 88.7 1.739 -14.0 90 54.18 2254 1895 27739 10203 90.4 1.694 -12.0 92 55.44 2314 1998 29582 10560 92.1 1.650 -10.0 95 56.70 2375 2105 31560 10899 93.6 1.606 -08.0 97 57.96 2437 2215 33684 11217 94.9 1.564 -06.0 99 59.22 2499 2330 35968 11513 96.1 1.522 -04.0 101 60.48 2561 2447 38423 11782 97.2 1.476 -02.0 103 61.74 2624 2568 41072 12024 98.1 1.429 +00.0 105 63.00 2686 2691 43927 12236 98.8 1.383 +02.0 107 64.26 2748 2818 47012 12416 99.4 1.339 +04.0 109 65.52 2811 2947 50347 12561 99.8 1.297 ! Near Maximum ! +06.0 111 66.78 2872 3078 53959 12671 100.0 1.255 ! Near Maximum ! +08.0 113 68.04 2934 3211 57878 12745 100.0 1.215 ! Near Maximum ! +10.0 116 69.30 2995 3346 62136 12807 100.0 1.176 !DANGEROUS LOAD-DO NOT USE! Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge Data for burning rate increased by 10% relative to nominal value: +Ba 105 63.00 2854 3039 54129 11798 100.0 1.261 ! Near Maximum ! Data for burning rate decreased by 10% relative to nominal value: [/QUOTE]
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