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Long Range Hunting & Shooting
.338 Lapua & Nosler Accubond Bullets
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<blockquote data-quote="Jay Kyle" data-source="post: 8573" data-attributes="member: 347"><p>According to my Quickload, Norma MRP looks to be the most 'accurate' load, however your IMR 7828 is pretty close as well. Unfortunately I dont' have any data on Retumbo in the program yet. Here's the numbers:</p><p></p><p>Norma MRP</p><p>---------</p><p>Cartridge : .338 Lapua Mag.</p><p>Bullet : .338, 225, NOS AccuBond 54357</p><p>Cartridge O.A.L. L6 : 3.681 inch or 93.50 mm</p><p>Barrel Length : 24.0 inch or 609.6 mm</p><p>Powder : Norma MRP</p><p></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 Btime</p><p> % % Grains fps ft.lbs psi psi % ms</p><p></p><p>-20.0 77 75.05 2385 2843 29963 10967 93.7 1.640</p><p>-18.0 79 76.92 2446 2990 32027 11303 94.9 1.598</p><p>-16.0 81 78.80 2507 3141 34239 11621 96.0 1.557</p><p>-14.0 83 80.68 2568 3295 36608 11920 96.9 1.517</p><p>-12.0 85 82.55 2629 3453 39147 12198 97.8 1.470</p><p>-10.0 87 84.43 2689 3614 41870 12454 98.5 1.425</p><p>-08.0 89 86.31 2750 3777 44789 12686 99.1 1.381</p><p>-06.0 91 88.18 2810 3944 47890 12893 99.5 1.338</p><p>-04.0 93 90.06 2869 4112 51181 13072 99.8 1.298</p><p>-02.0 95 91.93 2928 4283 54691 13224 100.0 1.259 ! HOT LOAD !</p><p>+00.0 97 93.81 2986 4455 58436 13347 100.0 1.221 ! HOT LOAD !</p><p>+02.0 98 95.69 3044 4629 62436 13460 100.0 1.185 !DANGEROUS LOAD-DO NOT USE!</p><p>+04.0 100 97.56 3101 4805 66710 13569 100.0 1.150 !DANGEROUS LOAD-DO NOT USE!</p><p>+06.0 102 99.44 3158 4982 71280 13675 100.0 1.116 !DANGEROUS LOAD-DO NOT USE!</p><p>+08.0 104 101.31 3214 5161 76172 13776 100.0 1.084 !DANGEROUS LOAD-DO NOT USE!</p><p>+10.0 106 103.19 3270 5341 81411 13872 100.0 1.052 !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 97 93.81 3112 4839 71214 12846 100.0 1.124 !DANGEROUS LOAD-DO NOT USE!</p><p>Data for burning rate decreased by 10% relative to nominal value:</p><p>-Ba 97 93.81 2798 3911 46107 13481 97.0 1.351</p><p></p><p></p><p>IMR 7828</p><p>--------</p><p>Cartridge : .338 Lapua Mag.</p><p>Bullet : .338, 225, NOS AccuBond 54357</p><p>Cartridge O.A.L. L6 : 3.681 inch or 93.50 mm</p><p>Barrel Length : 24.0 inch or 609.6 mm</p><p>Powder : IMR 7828</p><p></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 Btime</p><p> % % Grains fps ft.lbs psi psi % ms</p><p></p><p>-20.0 80 75.05 2359 2780 30173 10515 88.5 1.618</p><p>-18.0 82 76.92 2420 2926 32213 10881 90.0 1.576</p><p>-16.0 84 78.80 2482 3077 34392 11235 91.4 1.535</p><p>-14.0 86 80.68 2544 3233 36726 11577 92.7 1.495</p><p>-12.0 88 82.55 2606 3392 39219 11904 93.9 1.449</p><p>-10.0 90 84.43 2668 3556 41889 12215 95.0 1.403</p><p>-08.0 92 86.31 2730 3724 44746 12508 96.0 1.360</p><p>-06.0 94 88.18 2792 3896 47807 12781 96.9 1.318</p><p>-04.0 96 90.06 2855 4071 51096 13033 97.7 1.278</p><p>-02.0 98 91.93 2917 4250 54625 13262 98.3 1.239 ! HOT LOAD !</p><p>+00.0 100 93.81 2979 4433 58416 13467 98.9 1.202 ! HOT LOAD !</p><p>+02.0 102 95.69 3040 4618 62493 13646 99.3 1.165 !DANGEROUS LOAD-DO NOT USE!</p><p>+04.0 104 97.56 3102 4806 66882 13798 99.7 1.130 !DANGEROUS LOAD-DO NOT USE!</p><p>+06.0 106 99.44 3163 4997 71618 13922 99.9 1.096 !DANGEROUS LOAD-DO NOT USE!</p><p>+08.0 108 101.31 3223 5190 76716 14017 100.0 1.063 !DANGEROUS LOAD-DO NOT USE!</p><p>+10.0 110 103.19 3283 5386 82186 14087 100.0 1.032 !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 100 93.81 3123 4871 70951 13062 100.0 1.108 !DANGEROUS LOAD-DO NOT USE!</p><p>Data for burning rate decreased by 10% relative to nominal value:</p><p>-Ba 100 93.81 2779 3859 47216 13079 92.9 1.322</p><p></p><p>[ 12-31-2003: Message edited by: AlbertaBound ]</p></blockquote><p></p>
[QUOTE="Jay Kyle, post: 8573, member: 347"] According to my Quickload, Norma MRP looks to be the most 'accurate' load, however your IMR 7828 is pretty close as well. Unfortunately I dont' have any data on Retumbo in the program yet. Here's the numbers: Norma MRP --------- Cartridge : .338 Lapua Mag. Bullet : .338, 225, NOS AccuBond 54357 Cartridge O.A.L. L6 : 3.681 inch or 93.50 mm Barrel Length : 24.0 inch or 609.6 mm Powder : Norma MRP 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 Btime % % Grains fps ft.lbs psi psi % ms -20.0 77 75.05 2385 2843 29963 10967 93.7 1.640 -18.0 79 76.92 2446 2990 32027 11303 94.9 1.598 -16.0 81 78.80 2507 3141 34239 11621 96.0 1.557 -14.0 83 80.68 2568 3295 36608 11920 96.9 1.517 -12.0 85 82.55 2629 3453 39147 12198 97.8 1.470 -10.0 87 84.43 2689 3614 41870 12454 98.5 1.425 -08.0 89 86.31 2750 3777 44789 12686 99.1 1.381 -06.0 91 88.18 2810 3944 47890 12893 99.5 1.338 -04.0 93 90.06 2869 4112 51181 13072 99.8 1.298 -02.0 95 91.93 2928 4283 54691 13224 100.0 1.259 ! HOT LOAD ! +00.0 97 93.81 2986 4455 58436 13347 100.0 1.221 ! HOT LOAD ! +02.0 98 95.69 3044 4629 62436 13460 100.0 1.185 !DANGEROUS LOAD-DO NOT USE! +04.0 100 97.56 3101 4805 66710 13569 100.0 1.150 !DANGEROUS LOAD-DO NOT USE! +06.0 102 99.44 3158 4982 71280 13675 100.0 1.116 !DANGEROUS LOAD-DO NOT USE! +08.0 104 101.31 3214 5161 76172 13776 100.0 1.084 !DANGEROUS LOAD-DO NOT USE! +10.0 106 103.19 3270 5341 81411 13872 100.0 1.052 !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 97 93.81 3112 4839 71214 12846 100.0 1.124 !DANGEROUS LOAD-DO NOT USE! Data for burning rate decreased by 10% relative to nominal value: -Ba 97 93.81 2798 3911 46107 13481 97.0 1.351 IMR 7828 -------- Cartridge : .338 Lapua Mag. Bullet : .338, 225, NOS AccuBond 54357 Cartridge O.A.L. L6 : 3.681 inch or 93.50 mm Barrel Length : 24.0 inch or 609.6 mm Powder : IMR 7828 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 Btime % % Grains fps ft.lbs psi psi % ms -20.0 80 75.05 2359 2780 30173 10515 88.5 1.618 -18.0 82 76.92 2420 2926 32213 10881 90.0 1.576 -16.0 84 78.80 2482 3077 34392 11235 91.4 1.535 -14.0 86 80.68 2544 3233 36726 11577 92.7 1.495 -12.0 88 82.55 2606 3392 39219 11904 93.9 1.449 -10.0 90 84.43 2668 3556 41889 12215 95.0 1.403 -08.0 92 86.31 2730 3724 44746 12508 96.0 1.360 -06.0 94 88.18 2792 3896 47807 12781 96.9 1.318 -04.0 96 90.06 2855 4071 51096 13033 97.7 1.278 -02.0 98 91.93 2917 4250 54625 13262 98.3 1.239 ! HOT LOAD ! +00.0 100 93.81 2979 4433 58416 13467 98.9 1.202 ! HOT LOAD ! +02.0 102 95.69 3040 4618 62493 13646 99.3 1.165 !DANGEROUS LOAD-DO NOT USE! +04.0 104 97.56 3102 4806 66882 13798 99.7 1.130 !DANGEROUS LOAD-DO NOT USE! +06.0 106 99.44 3163 4997 71618 13922 99.9 1.096 !DANGEROUS LOAD-DO NOT USE! +08.0 108 101.31 3223 5190 76716 14017 100.0 1.063 !DANGEROUS LOAD-DO NOT USE! +10.0 110 103.19 3283 5386 82186 14087 100.0 1.032 !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 100 93.81 3123 4871 70951 13062 100.0 1.108 !DANGEROUS LOAD-DO NOT USE! Data for burning rate decreased by 10% relative to nominal value: -Ba 100 93.81 2779 3859 47216 13079 92.9 1.322 [ 12-31-2003: Message edited by: AlbertaBound ] [/QUOTE]
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