QL load data please! for 270 Win

rmarshall · Oct 11, 2016

I have a tikka t3x 270 win wanting to shoot 140 AB, have R19 that I've always had awesome luck getting to group. If someone could run a QL for the following 270 win tikka, 140 AB, and R19 and possibly R26. Wanting to try it. Thanks
Randy

Dwh7271 · Oct 11, 2016

Code:

Cartridge          : .270 Win. (SAAMI)
Bullet             : .277, 140, Nosler AccuBond 54765
Useable Case Capaci: 59.393 grain H2O = 3.856 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-19

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   82    44.95   2410    1806   31286   9090     88.5    1.523
-18.0   84    46.08   2471    1897   33380   9393     89.8    1.483
-16.0   86    47.20   2531    1992   35614   9689     91.1    1.443
-14.0   88    48.32   2592    2088   37997   9975     92.2    1.403
-12.0   90    49.45   2653    2187   40547  10252     93.3    1.360
-10.0   92    50.57   2713    2289   43271  10517     94.4    1.319
-08.0   94    51.69   2774    2393   46183  10770     95.3    1.280
-06.0   96    52.82   2835    2499   49302  11010     96.2    1.242
-04.0   99    53.94   2896    2607   52641  11235     97.0    1.205
-02.0  101    55.07   2957    2718   56221  11445     97.7    1.170  ! Near Maximum !
+00.0  103    56.19   3018    2831   60056  11638     98.3    1.135  ! Near Maximum !
+02.0  105    57.31   3078    2945   64143  11813     98.8    1.103  ! Near Maximum !
+04.0  107    58.44   3139    3062   68518  11970     99.2    1.071  !DANGEROUS LOAD-DO NOT USE!
+06.0  109    59.56   3199    3181   73214  12107     99.6    1.040  !DANGEROUS LOAD-DO NOT USE!
+08.0  111    60.68   3259    3301   78260  12223     99.8    1.010  !DANGEROUS LOAD-DO NOT USE!
+10.0  113    61.81   3318    3423   83691  12317    100.0    0.981  !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    103    56.19   3156    3097   71720  11414    100.0    1.054  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    103    56.19   2831    2491   48959  11261     92.3    1.242

Code:

Cartridge          : .270 Win. (SAAMI)
Bullet             : .277, 140, Nosler AccuBond 54765
Useable Case Capaci: 59.393 grain H2O = 3.856 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 24.0 inch = 609.6 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    47.08   2462    1884   29269  10195     95.2    1.560
-18.0   82    48.26   2528    1987   31406  10489     96.4    1.519
-16.0   84    49.43   2595    2094   33705  10759     97.4    1.477
-14.0   86    50.61   2662    2203   36206  11003     98.3    1.436
-12.0   88    51.79   2728    2314   38902  11218     99.0    1.390
-10.0   90    52.97   2794    2427   41820  11404     99.5    1.344
-08.0   92    54.14   2860    2543   44972  11559     99.8    1.299
-06.0   94    55.32   2925    2660   48416  11680    100.0    1.256
-04.0   96    56.50   2990    2778   52145  11773    100.0    1.214
-02.0   98    57.67   3053    2898   56202  11860    100.0    1.174  ! Near Maximum !
+00.0  100    58.85   3116    3019   60622  11943    100.0    1.136  ! Near Maximum !
+02.0  102    60.03   3179    3141   65408  12022    100.0    1.099  !DANGEROUS LOAD-DO NOT USE!
+04.0  104    61.20   3241    3265   70586  12095    100.0    1.063  !DANGEROUS LOAD-DO NOT USE!
+06.0  106    62.38   3303    3391   76207  12164    100.0    1.029  !DANGEROUS LOAD-DO NOT USE!
+08.0  108    63.56   3364    3518   82319  12227    100.0    0.996  !DANGEROUS LOAD-DO NOT USE!
+10.0  110    64.74   3426    3648   88979  12285    100.0    0.964  !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    58.85   3247    3278   76429  11434    100.0    1.040  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    100    58.85   2913    2637   46724  12411     98.4    1.265

That's a guess on the burn rate on RL26, but should be in the ballpark.

rmarshall · Oct 11, 2016

Thanks Dwh7271! Another question for you all! Should I chase a little more speed? I have a load worked up with R19 that both times shooting it has printed 1/2" and 5/8" groups. I do not have a chronograph, but thinking it's around 2900 fps. 54.5 grs of R19. It just flat shoots well. I would love to get around 2975-3000 fps but I know speed doesn't matter. I also want accuracy and this tikka likes 54.5 of R19. I stopped there when shot accurately. , but I know the O'l 270 can get some more velocity. What's your thoughts?? thanks for all the help and advice

DrMike · Oct 11, 2016

I always opt for accuracy over velocity. Consequently, many of my favourite loads are below maximum charge simply because they give the best accuracy.

SJB358 · Oct 11, 2016

DrMike":3x8gii4q said:
I always opt for accuracy over velocity. Consequently, many of my favourite loads are below maximum charge simply because they give the best accuracy.

I'm with the good Doc here. You could chase speed but I'd be in the end you won't get too terribly far and if you are getting groups like that with 140 Accubonds, there isn't much left to want.

jimbires · Oct 11, 2016

I do chase velocity , if it falls in line with accuracy . I won't give up accuracy for speed , but I'll keep working higher powder charges to see if I can get both to come together at a higher node . if I were you , I'd have to try to speed it up a little . this would be my off season project . it looks like RL26 will be able to get close to 3200FPS . keep in mind " a slow hit is way better than a fast miss "

I do have RL26 in my quickload .

Cartridge : .270 Win. (SAAMI)
Bullet : .277, 140, Nosler AccuBond 54765
Useable Case Capaci: 59.393 grain H2O = 3.856 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 24.0 inch = 609.6 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 85 49.76 2490 1928 30214 10541 93.3 1.538
-18.0 87 51.00 2562 2040 32498 10876 94.8 1.493
-16.0 89 52.25 2633 2155 34993 11186 96.1 1.450
-14.0 91 53.49 2705 2275 37694 11468 97.2 1.405
-12.0 93 54.74 2777 2397 40628 11721 98.1 1.356
-10.0 95 55.98 2848 2522 43825 11941 98.9 1.308
-08.0 97 57.22 2920 2650 47311 12126 99.4 1.262
-06.0 99 58.47 2991 2781 51117 12274 99.8 1.218
-04.0 101 59.71 3061 2914 55281 12383 100.0 1.175 ! Near Maximum !
-02.0 104 60.96 3131 3048 59846 12458 100.0 1.134 ! Near Maximum !
+00.0 106 62.20 3201 3185 64853 12524 100.0 1.094 !DANGEROUS LOAD-DO NOT USE!
+02.0 108 63.44 3270 3323 70376 12584 100.0 1.056 !DANGEROUS LOAD-DO NOT USE!
+04.0 110 64.69 3338 3464 76464 12639 100.0 1.019 !DANGEROUS LOAD-DO NOT USE!
+06.0 112 65.93 3406 3607 83190 12687 100.0 0.983 !DANGEROUS LOAD-DO NOT USE!
+08.0 114 67.18 3474 3752 90593 12727 100.0 0.949 !DANGEROUS LOAD-DO NOT USE!
+10.0 116 68.42 3542 3900 98773 12761 100.0 0.915 !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 106 62.20 3344 3475 82534 11948 100.0 0.999 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 106 62.20 2978 2757 50155 12913 97.6 1.220

SJB358 · Oct 11, 2016

Good point Jim. 26 is REALLY good in my 270 and 7mm WSM's. Fast and very accurate.

Dwh7271 · Oct 11, 2016

I modified the burn on the RL26 when I ran it.
The .339 in QL is nowhere near experienced burn, at least in the four I ran it in fwiw.
It's a really good powder and versatile but the QL burn is off.

jimbires · Oct 12, 2016

Dwh7271":1xuby58b said:
I modified the burn on the RL26 when I ran it.
The .339 in QL is nowhere near experienced burn, at least in the four I ran it in fwiw.
It's a really good powder and versatile but the QL burn is off.

Dewey is talking from experience , and this can't be argued with . I have a can of RL26 , but I haven't played much with it . so , as always when reloading , start low and work up while watching for pressure .