velocity?? Quickload

velvetant · Jan 23, 2014

The local range won't let me use a chrono and I don't have any other place to shoot at the moment.
Can someone run this across Quickload?
How close is Quickload with velocity?
I shoot a 6.5 Creedmoor
120NBT oal 2.800"
43.5gr H4350
CCI 250
27" 3 groove 1-8 twist Lilja barrel

DrMike · Jan 23, 2014

velvetant":1s0a0y93 said:
The local range won't let me use a chrono and I don't have any other place to shoot at the moment.
Can someone run this across Quickload?
How close is Quickload with velocity?
I shoot a 6.5 Creedmoor
120NBT oal 2.800"
43.5gr H4350
CCI 250
27" 3 groove 1-8 twist Lilja barrel

Cartridge : 6.5 Creedmoor Hornady
Bullet : .264, 120, Nosler BalTip 26120
Useable Case Capaci: 48.970 grain H2O = 3.180 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length : 27.0 inch = 685.8 mm
Powder : Hodgdon H4350

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 79 34.80 2356 1479 27806 6468 87.6 1.684
-18.0 81 35.67 2411 1549 29550 6676 88.8 1.644
-16.0 83 36.54 2467 1621 31400 6880 90.0 1.605
-14.0 85 37.41 2522 1695 33364 7078 91.1 1.567
-12.0 87 38.28 2578 1770 35448 7271 92.2 1.529
-10.0 89 39.15 2633 1847 37664 7458 93.1 1.492
-08.0 91 40.02 2688 1926 40018 7639 94.1 1.451
-06.0 93 40.89 2744 2006 42518 7811 94.9 1.411
-04.0 95 41.76 2799 2087 45160 7976 95.7 1.373
-02.0 97 42.63 2854 2170 47947 8133 96.5 1.337
+00.0 98 43.50 2909 2255 50906 8280 97.1 1.301
+02.0 100 44.37 2964 2340 54053 8418 97.7 1.267 ! Near Maximum !
+04.0 102 45.24 3018 2427 57401 8545 98.3 1.234 ! Near Maximum !
+06.0 104 46.11 3073 2516 60965 8662 98.7 1.202 ! Near Maximum !
+08.0 106 46.98 3127 2605 64762 8767 99.1 1.171 !DANGEROUS LOAD-DO NOT USE!
+10.0 108 47.85 3181 2696 68811 8861 99.4 1.141 !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 98 43.50 3041 2464 60037 8221 99.9 1.213 ! Near Maximum !
Data for burning rate decreased by 10% relative to nominal value:
-Ba 98 43.50 2736 1995 42008 7964 90.8 1.415

Cartridge : 6.5 Creedmoor Hornady
Bullet : .264, 120, Nosler BalTip 26120
Useable Case Capaci: 48.970 grain H2O = 3.180 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length : 27.0 inch = 685.8 mm
Powder : Hodgdon H4350

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 37.04 2499 1663 32514 6994 90.6 1.583
-18.0 86 37.97 2558 1743 34681 7202 91.8 1.543
-16.0 88 38.89 2617 1824 36993 7404 92.9 1.504
-14.0 90 39.82 2676 1908 39458 7597 93.9 1.460
-12.0 92 40.74 2734 1992 42088 7783 94.8 1.418
-10.0 94 41.67 2793 2079 44880 7960 95.7 1.377
-08.0 96 42.60 2852 2167 47835 8127 96.4 1.338
-06.0 99 43.52 2910 2257 50984 8283 97.1 1.300
-04.0 101 44.45 2969 2348 54345 8429 97.8 1.264 ! Near Maximum !
-02.0 103 45.37 3027 2441 57935 8564 98.3 1.229 ! Near Maximum !
+00.0 105 46.30 3084 2535 61774 8686 98.8 1.195 ! Near Maximum !
+02.0 107 47.23 3142 2631 65881 8795 99.2 1.163 !DANGEROUS LOAD-DO NOT USE!
+04.0 109 48.15 3199 2727 70279 8891 99.5 1.131 !DANGEROUS LOAD-DO NOT USE!
+06.0 111 49.08 3256 2825 74996 8973 99.8 1.101 !DANGEROUS LOAD-DO NOT USE!
+08.0 113 50.00 3313 2924 80060 9040 99.9 1.071 !DANGEROUS LOAD-DO NOT USE!
+10.0 115 50.93 3369 3025 85505 9092 100.0 1.043 !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 46.30 3207 2741 72810 8440 100.0 1.118 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 105 46.30 2915 2265 50959 8531 93.8 1.297

RiverRider · Jan 23, 2014

I've noticed disparity between QL predicted velocity and actual velocity. I think it's due to variability of burn rate. Since pressure is one of my main concerns in this game, I relate the actual velocities I see with the pressures required to produce them as predicted by QL. This technique seems to be viable. I know that burn rate can be adjusted in the powder database but I have not bothered to do that. It just does not seem to be necessary, at least not for my own purposes.

kraky · Jan 23, 2014

Chamber size and powder lot variability can play into things too. I usually get a chrono reading and change the case capacity function on ql till it matches chrono speed and work up from there. Also temp should be matched....usually 1 degree down from 70 degrees equals about 1 fps. Not a perfect way to do it...but quick and effective for me.
To the original poster....could you go to public land and run a few over your chrono to check?
Must be somewhere you could do that....once in a while I go to a buddy's house just outside town...line up w/a stump and run a few off.....w/his permission of course!

velvetant · Jan 24, 2014

thanks guys.
Kraky,,, have not lived out here long enough to find those places yet

JD338 · Jan 24, 2014

Randy,

If your club has longer ranges, ie: 200, 300, 400 yds, you may be able to get a good idea of MV by measuring drop at longer distances with a 100 yard zero and plug your date in a ballistic calculator.

JD338