Quick load for 340 WBY please

[69gto]

Could someone run a 250g AccuBond for me? .340 Wby.,26 inch barrel, Wby brass F215 primer, RL 26 powder. Thanks.

 

[Dwh7271]

I adjusted it for an average burn rate that we have actually been seeing. (the QL burn rate is off on this powder)

Cartridge          : .340 Weath. Mag.
Bullet             : .338, 250, Nosler AccuBond 57287
Useable Case Capaci: 84.058 grain H2O = 5.458 cm³
Cartridge O.A.L. L6: 3.675 inch = 93.35 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : Alliant Reloder-26 ?

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.429% 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

-04.3   95    78.93   2787    4312   52675  10301    100.0    1.365
-03.9   95    79.29   2799    4349   53512  10319    100.0    1.355
-03.4   96    79.64   2811    4386   54367  10338    100.0    1.346  ! Near Maximum !
-03.0   96    79.99   2823    4423   55235  10356    100.0    1.336  ! Near Maximum !
-02.6   96    80.35   2835    4461   56116  10375    100.0    1.327  ! Near Maximum !
-02.1   97    80.70   2847    4498   57011  10393    100.0    1.318  ! Near Maximum !
-01.7   97    81.06   2858    4536   57919  10411    100.0    1.309  ! Near Maximum !
-01.3   98    81.41   2870    4573   58840  10428    100.0    1.300  ! Near Maximum !
-00.9   98    81.76   2882    4611   59776  10446    100.0    1.291  ! Near Maximum !
-00.4   99    82.12   2894    4649   60727  10463    100.0    1.283  ! Near Maximum !
+00.0   99    82.47   2906    4687   61694  10481    100.0    1.274  ! Near Maximum !
+00.4   99    82.82   2917    4725   62677  10498    100.0    1.265  ! Near Maximum !
+00.9  100    83.18   2929    4763   63676  10515    100.0    1.257  !DANGEROUS LOAD-DO NOT USE!
+01.3  100    83.53   2941    4801   64691  10531    100.0    1.248  !DANGEROUS LOAD-DO NOT USE!
+01.7  101    83.88   2953    4840   65724  10548    100.0    1.240  !DANGEROUS LOAD-DO NOT USE!
+02.1  101    84.24   2964    4878   66774  10564    100.0    1.231  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 3% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 3% relative to nominal value:
+Ba     99    82.47   2942    4806   66367  10335    100.0    1.240  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 3% relative to nominal value:
-Ba     99    82.47   2864    4553   57069  10645    100.0    1.311  ! Near Maximum !

 

[69gto]

Thank you DWH but I am a little confused, Nosler book shows 83g of RL 22 as max so I started with 83g of 26 which only chronyed at 2804 fps. So it looks like that is still way under pressure. What would the unadjusted quikload have projected? Thanks. By the way rifle is a MARKV with .378 freebore.

 

[Dwh7271]

Cartridge          : .340 Weath. Mag.
Bullet             : .338, 250, Nosler AccuBond 57287
Useable Case Capaci: 84.058 grain H2O = 5.458 cm³
Cartridge O.A.L. L6: 3.675 inch = 93.35 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : Alliant Reloder-26

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.429% 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

-04.3   95    78.93   2742    4175   48868  10468    100.0    1.405
-03.9   95    79.29   2755    4213   49632  10486    100.0    1.395
-03.4   96    79.64   2767    4250   50409  10504    100.0    1.386
-03.0   96    79.99   2779    4288   51201  10522    100.0    1.376
-02.6   96    80.35   2792    4326   52007  10540    100.0    1.366
-02.1   97    80.70   2804    4364   52828  10557    100.0    1.357
-01.7   97    81.06   2816    4402   53661  10574    100.0    1.348
-01.3   98    81.41   2828    4440   54512  10592    100.0    1.338  ! Near Maximum !
-00.9   98    81.76   2840    4479   55377  10609    100.0    1.329  ! Near Maximum !
-00.4   99    82.12   2853    4517   56258  10625    100.0    1.320  ! Near Maximum !
+00.0   99    82.47   2865    4556   57154  10642    100.0    1.311  ! Near Maximum !
+00.4   99    82.82   2877    4594   58067  10659    100.0    1.302  ! Near Maximum !
+00.9  100    83.18   2889    4633   58982  10675    100.0    1.293  ! Near Maximum !
+01.3  100    83.53   2901    4672   59944  10691    100.0    1.284  ! Near Maximum !
+01.7  101    83.88   2913    4710   60909  10707    100.0    1.275  ! Near Maximum !
+02.1  101    84.24   2925    4749   61891  10723    100.0    1.266  ! Near Maximum !

Results caused by ± 3% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 3% relative to nominal value:
+Ba     99    82.47   2905    4686   61645  10482    100.0    1.274  ! Near Maximum !
Data for burning rate decreased by 3% relative to nominal value:
-Ba     99    82.47   2818    4409   52932  10823    100.0    1.351

 

[Dwh7271]

You must have a slow batch.
Here it is calibrated for what you saw.

Cartridge          : .340 Weath. Mag.
Bullet             : .338, 250, Nosler AccuBond 57287
Useable Case Capaci: 84.058 grain H2O = 5.458 cm³
Cartridge O.A.L. L6: 3.675 inch = 93.35 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : Alliant Reloder-26 ?

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.426% 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

-04.3   95    79.46   2675    3973   44255  10744     99.6    1.463
-03.8   96    79.82   2688    4011   44931  10773     99.6    1.453
-03.4   96    80.17   2701    4050   45620  10800     99.7    1.442
-03.0   97    80.52   2714    4089   46320  10827     99.8    1.432
-02.6   97    80.88   2727    4128   47032  10851     99.8    1.422
-02.1   98    81.23   2740    4167   47757  10875     99.9    1.412
-01.7   98    81.59   2753    4206   48494  10897     99.9    1.402
-01.3   98    81.94   2765    4245   49244  10918     99.9    1.392
-00.9   99    82.29   2778    4285   50010  10938    100.0    1.383
-00.4   99    82.65   2791    4324   50788  10956    100.0    1.373
+00.0  100    83.00   2804    4364   51579  10973    100.0    1.363
+00.4  100    83.35   2816    4403   52386  10989    100.0    1.354
+00.9  100    83.71   2829    4443   53206  11004    100.0    1.344
+01.3  101    84.06   2842    4483   54042  11018    100.0    1.335
+01.7  101    84.41   2854    4523   54893  11033    100.0    1.326  ! Near Maximum !
+02.1  102    84.77   2867    4563   55760  11047    100.0    1.316  ! Near Maximum !

Results caused by ± 3% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 3% relative to nominal value:
+Ba    100    83.00   2852    4515   55506  10788    100.0    1.324  ! Near Maximum !
Data for burning rate decreased by 3% relative to nominal value:
-Ba    100    83.00   2749    4194   47924  11115     9

 

[69gto]

Yes that is closer to my chrony readings, 85g went 2850 and 87g went 2940 fps. I like to run my MARKV's up to Wby's factory loaded pressures which I believe are around 63000 psi. My cases hold 99.5g of water.

 

[jimbires]

69GTO , what is your COAL measured off the tip ?

 

[69gto]

As of now it is 3.710, that gives me about .050 clearance in magazine box. I have not shot these for group yet, waiting for rain to stop. So far this rifle has only liked 210 partitions.

 

[jimbires]

As of now it is 3.710, that gives me about .050 clearance in magazine box. I have not shot these for group yet, waiting for rain to stop. So far this rifle has only liked 210 partitions.

COAL , measured off the tip is an important input for quickload .

what chrony are you using ?

I stumbled into a little info I've been playing with . just to see how it makes things line up .

 

[69gto]

Magnetospeed

 

[jimbires]

Magnetospeed

great .

would you double check a couple case water capacities ? you want to weigh a fired unsized case . then fill it with water , until the water is flat with the top of the case neck and weigh it again . the difference is the water capacity . I use a child's medicine syringe for filling the case with water . if you get a little bubble on top of the case , just touch it with a paper towel ,it will absorb it right off .the reason I'm asking your 99.5 grain capacity is less than quickload has as a default , I usually see my capacities more than what's listed .

 

[SJB358]

Nothing much to add other than that 340 is a beast with 250’s. Can’t imagine much it wouldn’t handle with the 250 AB at 2900-3000. That’s a wicked combo.

 

[69gto]

Jimbires: I don't have any unsized brass until I shoot again. I weighed some new 20 year old brass against some newly purchased and the new old weighed 224g vs. the new at 227g. They both held 99.9g of water. I can't weigh a case full of water on my 50 year old balance scale without it tipping over.

 

[69gto]

102.5g water on once fired brass.

 

[jimbires]

102.5g water on once fired brass.

fantastic ! I'll run a few of the powder charges you have listed and we'll see how things line up .

 

[jimbires]

here is 83.0 gr . your actual velocity was 2804 FPS quickload shows 2849 FPS . difference of 45 FPS

Cartridge : .340 Weath. Mag.
Bullet : .338, 250, Nosler AccuBond 57287
Useable Case Capaci: 87.352 grain H2O = 5.672 cm³
Cartridge O.A.L. L6: 3.710 inch = 94.23 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Alliant Reloder-26

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 77 66.40 2257 2827 26360 9348 94.6 1.811
-18.0 79 68.06 2317 2979 28155 9632 95.8 1.764
-16.0 81 69.72 2377 3135 30087 9899 96.8 1.717
-14.0 82 71.38 2437 3296 32159 10145 97.7 1.672
-12.0 84 73.04 2496 3460 34388 10371 98.5 1.628
-10.0 86 74.70 2556 3627 36784 10573 99.1 1.585
-08.0 88 76.36 2616 3798 39364 10752 99.5 1.536
-06.0 90 78.02 2675 3971 42144 10904 99.8 1.487
-04.0 92 79.68 2733 4148 45144 11030 100.0 1.440
-02.0 94 81.34 2792 4326 48382 11132 100.0 1.395
+00.0 96 83.00 2849 4506 51882 11227 100.0 1.351
+02.0 98 84.66 2906 4689 55672 11320 100.0 1.309 ! Near Maximum !
+04.0 100 86.32 2963 4874 59779 11408 100.0 1.269 ! Near Maximum !
+06.0 102 87.98 3019 5061 64220 11492 100.0 1.230 !DANGEROUS LOAD-DO NOT USE!
+08.0 104 89.64 3075 5250 68999 11572 100.0 1.192 !DANGEROUS LOAD-DO NOT USE!
+10.0 105 91.30 3131 5443 74162 11648 100.0 1.156 !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 83.00 2976 4918 65627 10724 100.0 1.235 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 96 83.00 2652 3905 40315 11531 97.4 1.504



85.0 gr , actual velocity 2850 FPS , quickload shows 2918FPS . a difference of 68 FPS . you could have gotten an inaccurate velocity reading on this one ? who knows .


Cartridge : .340 Weath. Mag.
Bullet : .338, 250, Nosler AccuBond 57287
Useable Case Capaci: 87.352 grain H2O = 5.672 cm³
Cartridge O.A.L. L6: 3.710 inch = 94.23 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Alliant Reloder-26

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 68.00 2314 2974 28088 9622 95.8 1.765
-18.0 81 69.70 2376 3134 30063 9895 96.8 1.718
-16.0 82 71.40 2437 3298 32185 10148 97.7 1.671
-14.0 84 73.10 2499 3466 34471 10379 98.5 1.626
-12.0 86 74.80 2560 3637 36934 10585 99.1 1.583
-10.0 88 76.50 2621 3812 39591 10766 99.6 1.531
-08.0 90 78.20 2681 3990 42458 10919 99.9 1.482
-06.0 92 79.90 2741 4171 45560 11045 100.0 1.434
-04.0 94 81.60 2801 4354 48913 11147 100.0 1.388
-02.0 96 83.30 2860 4539 52542 11244 100.0 1.344
+00.0 98 85.00 2918 4727 56485 11338 100.0 1.301 ! Near Maximum !
+02.0 100 86.70 2976 4916 60767 11427 100.0 1.260 ! Near Maximum !
+04.0 102 88.40 3034 5109 65395 11513 100.0 1.220 !DANGEROUS LOAD-DO NOT USE!
+06.0 104 90.10 3091 5303 70389 11594 100.0 1.182 !DANGEROUS LOAD-DO NOT USE!
+08.0 106 91.80 3148 5501 75799 11670 100.0 1.145 !DANGEROUS LOAD-DO NOT USE!
+10.0 108 93.50 3205 5702 81668 11741 100.0 1.110 !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 85.00 3040 5130 71358 10843 100.0 1.191 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 98 85.00 2727 4129 43699 11786 98.3 1.448



87.0 gr , actual 2940 FPS . quickload shows 2986 FPS . difference of 46 FPS .


Cartridge : .340 Weath. Mag.
Bullet : .338, 250, Nosler AccuBond 57287
Useable Case Capaci: 87.352 grain H2O = 5.672 cm³
Cartridge O.A.L. L6: 3.710 inch = 94.23 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Alliant Reloder-26

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 80 69.60 2372 3124 29942 9880 96.8 1.720
-18.0 82 71.34 2435 3292 32108 10140 97.7 1.673
-16.0 84 73.08 2498 3464 34443 10376 98.5 1.627
-14.0 86 74.82 2560 3639 36964 10587 99.1 1.582
-12.0 88 76.56 2623 3819 39688 10772 99.6 1.530
-10.0 90 78.30 2685 4001 42635 10928 99.9 1.479
-08.0 92 80.04 2746 4186 45825 11054 100.0 1.430
-06.0 94 81.78 2807 4374 49284 11157 100.0 1.383
-04.0 96 83.52 2867 4563 53039 11257 100.0 1.338
-02.0 98 85.26 2927 4755 57117 11352 100.0 1.294 ! Near Maximum !
+00.0 100 87.00 2986 4950 61560 11443 100.0 1.253 ! Near Maximum !
+02.0 103 88.74 3045 5147 66363 11529 100.0 1.212 !DANGEROUS LOAD-DO NOT USE!
+04.0 105 90.48 3104 5347 71561 11611 100.0 1.173 !DANGEROUS LOAD-DO NOT USE!
+06.0 107 92.22 3162 5551 77204 11688 100.0 1.136 !DANGEROUS LOAD-DO NOT USE!
+08.0 109 93.96 3220 5757 83342 11759 100.0 1.100 !DANGEROUS LOAD-DO NOT USE!
+10.0 111 95.70 3279 5968 90032 11825 100.0 1.065 !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 87.00 3103 5346 77605 10956 100.0 1.150 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 87.00 2802 4359 47422 12005 99.1 1.392


this should be a max load . work up to this , and use caution . you might not be able to reach this powder charge . quyickload has the 340 WBY rated at 63817 PSI . this load yields 63723 PSI
**** MAX *** 87.8 gr . quickload 3013 FPS . I'll guess your actual velocity will be about 2970 FPS .

Cartridge : .340 Weath. Mag.
Bullet : .338, 250, Nosler AccuBond 57287
Useable Case Capaci: 87.352 grain H2O = 5.672 cm³
Cartridge O.A.L. L6: 3.710 inch = 94.23 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Alliant Reloder-26

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 81 70.24 2395 3185 30720 9978 97.1 1.703
-18.0 83 72.00 2459 3356 32968 10232 98.0 1.655
-16.0 85 73.75 2522 3531 35394 10461 98.8 1.610
-14.0 87 75.51 2585 3710 38016 10663 99.3 1.561
-12.0 89 77.26 2648 3892 40851 10838 99.7 1.509
-10.0 91 79.02 2710 4077 43923 10983 99.9 1.458
-08.0 93 80.78 2772 4265 47254 11098 100.0 1.410
-06.0 95 82.53 2833 4455 50864 11201 100.0 1.363
-04.0 97 84.29 2894 4648 54796 11299 100.0 1.318 ! Near Maximum !
-02.0 99 86.04 2954 4843 59073 11393 100.0 1.275 ! Near Maximum !
+00.0 101 87.80 3013 5040 63723 11483 100.0 1.234 !DANGEROUS LOAD-DO NOT USE!
+02.0 103 89.56 3073 5241 68748 11568 100.0 1.194 !DANGEROUS LOAD-DO NOT USE!
+04.0 105 91.31 3132 5444 74201 11648 100.0 1.155 !DANGEROUS LOAD-DO NOT USE!
+06.0 108 93.07 3191 5651 80131 11723 100.0 1.118 !DANGEROUS LOAD-DO NOT USE!
+08.0 110 94.82 3249 5861 86591 11793 100.0 1.083 !DANGEROUS LOAD-DO NOT USE!
+10.0 112 96.58 3308 6075 93646 11856 100.0 1.048 !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 101 87.80 3129 5434 80262 10999 100.0 1.133 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 101 87.80 2832 4453 49014 12081 99.3 1.371

 

[69gto]

thanks Jimbires: 88G WENT 2974fps and 89g went3037, I shot the 87g load and shots 2 and 3 were touching 1& 1/4 inches from 1st shot. I shortened up oal to 3.690 and will try the 87g load again tomorrow weather permitting.

 

[jimbires]

88.0 gr actual velocity 2974 FPS .... quickload 3020 FPS difference of 46 FPS
89.0 gr actual velocity 3037 FPS .....quickload 3054 FPS difference of 17 FPS


85.0 gr we had a difference of 68 FPS , now 89.0 gr we have a difference of 17 FPS . the other powder charges seem to be about 45 FPS difference . I like to see things line up across the whole range , it makes me have more confidence in the info . just watch for pressure signs , and use commonsense .

 

[jimbires]

Dewey , it's been brought to my attention that I stepped on your toes . that wasn't my intention when I got involved in this thread . if I did I'm sorry .

 

[Dwh7271]

Not in the slightest Jim.
No apology necessary.