220 Swift Quickload request

Bruce Mc · Jan 9, 2022

Could one of you gentlemen oblige me with a couple of qls for 220 Swift.
50 gr nosler Ballistic tip
26" 1/14 barrel
H-4895 and IMR 3031
Thank you in advance

DrMike · Jan 9, 2022

Cartridge : .220 Swift
Bullet : .224, 50, Nosler BalTip 39522
Useable Case Capaci: 43.818 grain H2O = 2.845 cm³
Cartridge O.A.L. L6: 2.680 inch = 68.07 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Hodgdon H4895

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0 86 34.83 3695 1516 44450 9744 95.9 1.075
-09.0 87 35.22 3734 1548 45854 9847 96.3 1.060
-08.0 88 35.60 3772 1580 47301 9947 96.7 1.044
-07.0 89 35.99 3811 1612 48791 10044 97.1 1.030
-06.0 90 36.38 3849 1645 50326 10138 97.4 1.015
-05.0 91 36.77 3887 1677 51907 10228 97.7 1.001
-04.0 92 37.15 3925 1710 53536 10314 98.0 0.987 ! Near Maximum !
-03.0 93 37.54 3963 1744 55214 10397 98.3 0.973 ! Near Maximum !
-02.0 94 37.93 4001 1777 56944 10476 98.6 0.960 ! Near Maximum !
-01.0 95 38.31 4038 1810 58726 10551 98.8 0.946 ! Near Maximum !
+00.0 96 38.70 4076 1844 60563 10622 99.1 0.933 ! Near Maximum !
+01.0 97 39.09 4113 1878 62457 10689 99.3 0.921 !DANGEROUS LOAD-DO NOT USE!
+02.0 98 39.47 4150 1912 64409 10753 99.4 0.908 !DANGEROUS LOAD-DO NOT USE!
+03.0 99 39.86 4187 1947 66422 10812 99.6 0.896 !DANGEROUS LOAD-DO NOT USE!
+04.0 100 40.25 4224 1981 68498 10866 99.7 0.884 !DANGEROUS LOAD-DO NOT USE!
+05.0 101 40.64 4261 2015 70639 10917 99.8 0.872 !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 96 38.70 4243 1999 71236 10345 100.0 0.868 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 96 38.70 3845 1641 50046 10419 94.2 1.018

DrMike · Jan 9, 2022

Cartridge : .220 Swift
Bullet : .224, 50, Nosler BalTip 39522
Useable Case Capaci: 43.818 grain H2O = 2.845 cm³
Cartridge O.A.L. L6: 2.680 inch = 68.07 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : IMR 3031

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0 90 33.93 3756 1566 44639 9598 99.8 1.065
-09.0 91 34.31 3793 1597 46103 9656 99.9 1.049
-08.0 92 34.68 3830 1629 47612 9708 100.0 1.034
-07.0 93 35.06 3866 1660 49167 9755 100.0 1.019
-06.0 94 35.44 3903 1691 50769 9797 100.0 1.005
-05.0 95 35.82 3939 1722 52420 9838 100.0 0.991
-04.0 96 36.19 3974 1754 54122 9878 100.0 0.977 ! Near Maximum !
-03.0 97 36.57 4010 1785 55876 9917 100.0 0.963 ! Near Maximum !
-02.0 98 36.95 4045 1816 57684 9956 100.0 0.950 ! Near Maximum !
-01.0 99 37.32 4080 1848 59548 9994 100.0 0.937 ! Near Maximum !
+00.0 100 37.70 4114 1879 61470 10032 100.0 0.924 ! Near Maximum !
+01.0 101 38.08 4149 1911 63451 10069 100.0 0.912 !DANGEROUS LOAD-DO NOT USE!
+02.0 102 38.45 4183 1943 65494 10105 100.0 0.899 !DANGEROUS LOAD-DO NOT USE!
+03.0 103 38.83 4217 1974 67601 10140 100.0 0.887 !DANGEROUS LOAD-DO NOT USE!
+04.0 104 39.21 4251 2006 69774 10175 100.0 0.875 !DANGEROUS LOAD-DO NOT USE!
+05.0 105 39.59 4284 2038 72015 10209 100.0 0.864 !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 37.70 4247 2003 73514 9677 100.0 0.860 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 37.70 3910 1697 49489 10422 99.1 1.011