Originally Posted by TomM1
Originally Posted by antelope_sniper
The 129gr LRX is not included in the latest version of QL so I got as close as I could.

Keep in mind RL-26 acts like magic pixie dust in the .270 Winchester, or at least that's what all the published data and QL seems to indicate. I haven't had the opportunity to test it myself.

Code
Cartridge          : .270 Win. (SAAMI)
Bullet             : .277, 130, Barnes 'TTSX'BT 30276
Useable Case Capaci: 59.268 grain H2O = 3.848 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Alliant Reloder-26 *C

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.794% 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

-07.9   99    58.00   2920    2461   46358  13371     98.0    1.176
-07.1  100    58.50   2950    2513   47816  13469     98.4    1.160
-06.3  100    59.00   2981    2564   49326  13561     98.7    1.143
-05.6  101    59.50   3011    2617   50894  13646     98.9    1.126
-04.8  102    60.00   3041    2670   52518  13725     99.2    1.109
-04.0  103    60.50   3071    2723   54204  13797     99.4    1.093
-03.2  104    61.00   3102    2777   55953  13862     99.6    1.077  ! Near Maximum !
-02.4  105    61.50   3132    2831   57771  13919     99.7    1.062  ! Near Maximum !
-01.6  106    62.00   3162    2886   59657  13970     99.8    1.046  ! Near Maximum !
-00.8  106    62.50   3192    2941   61620  14012     99.9    1.031  ! Near Maximum !
+00.0  107    63.00   3222    2997   63659  14048    100.0    1.016  ! Near Maximum !
+00.8  108    63.50   3252    3053   65779  14075    100.0    1.001  !DANGEROUS LOAD-DO NOT USE!
+01.6  109    64.00   3282    3109   67985  14097    100.0    0.986  !DANGEROUS LOAD-DO NOT USE!
+02.4  110    64.50   3311    3165   70281  14119    100.0    0.971  !DANGEROUS LOAD-DO NOT USE!
+03.2  111    65.00   3341    3222   72671  14139    100.0    0.957  !DANGEROUS LOAD-DO NOT USE!
+04.0  112    65.50   3371    3280   75162  14158    100.0    0.943  !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    107    63.00   3280    3105   68634  13817    100.0    0.985  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 3% relative to nominal value:
-Ba    107    63.00   3156    2876   59031  14202     99.5    1.048  ! Near Maximum !


Much Thanks. The text wraps kind of funny, if I’m reading it right 61.0 grains is producing 55953 psi?


Yes. That's the QL estimate.

You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.

You cannot over estimate the unimportance of nearly everything. John Maxwell