QuickLoad Request for a 260REM

[deerhntr]

Hey Guys,

Working on a round for my new Hart Barreled 260REM. Requesting your help with a couple bullets.

1.) Hornady 6.5mm, 129gr, Interbond. #26209
2.) Barnes 6.5mm LRX, 127gr, #30228
3.) Barnes 6.5mm TTSX, 120gr, #30242

Powder: H4350
Primer: Rem Large Rifle
Case: Alpha Brass

Barrel: Hart, 24", 1:8 Twist

Thanks much, in advance.

Russ

 

[BruceP]

Cartridge : .260 Rem
Bullet : .264, 129, Hornady Interbond 26209
Useable Case Capaci: 47.071 grain H2O = 3.056 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H4350 *T

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 34.40 2268 1473 30164 7390 88.6 1.580
-18.0 83 35.26 2322 1544 32106 7626 89.8 1.539
-16.0 85 36.12 2376 1617 34168 7856 90.9 1.499
-14.0 87 36.98 2430 1691 36361 8081 92.0 1.460
-12.0 89 37.84 2484 1767 38691 8298 93.0 1.419
-10.0 91 38.70 2538 1845 41174 8508 94.0 1.379
-08.0 93 39.56 2592 1925 43800 8710 94.9 1.340
-06.0 95 40.42 2647 2006 46573 8903 95.7 1.302
-04.0 97 41.28 2701 2089 49518 9086 96.4 1.267
-02.0 99 42.14 2754 2173 52653 9258 97.1 1.232 ! Near Maximum !
+00.0 101 43.00 2808 2259 55991 9420 97.7 1.198 ! Near Maximum !
+02.0 103 43.86 2862 2346 59549 9569 98.3 1.166 !DANGEROUS LOAD-DO NOT USE!
+04.0 105 44.72 2915 2434 63344 9707 98.8 1.134 !DANGEROUS LOAD-DO NOT USE!
+06.0 107 45.58 2969 2524 67394 9831 99.1 1.104 !DANGEROUS LOAD-DO NOT USE!
+08.0 109 46.44 3022 2615 71723 9941 99.5 1.075 !DANGEROUS LOAD-DO NOT USE!
+10.0 111 47.30 3075 2708 76353 10037 99.7 1.046 !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 43.00 2932 2462 65990 9296 100.0 1.117 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 101 43.00 2645 2003 46209 9111 91.8 1.303

 

[BruceP]

Cartridge : .260 Rem
Bullet : .264, 127, Barnes 'LRX'BT 30228
Useable Case Capaci: 44.906 grain H2O = 2.916 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H4350 *T

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 34.40 2320 1518 32072 7316 89.0 1.530
-18.0 87 35.26 2376 1592 34210 7545 90.2 1.489
-16.0 89 36.12 2432 1668 36491 7769 91.3 1.449
-14.0 91 36.98 2489 1746 38925 7986 92.4 1.407
-12.0 93 37.84 2545 1826 41523 8196 93.4 1.366
-10.0 96 38.70 2601 1908 44300 8397 94.4 1.326
-08.0 98 39.56 2657 1991 47267 8589 95.2 1.287
-06.0 100 40.42 2714 2076 50419 8771 96.0 1.250
-04.0 102 41.28 2770 2163 53771 8942 96.8 1.214 ! Near Maximum !
-02.0 104 42.14 2826 2252 57357 9102 97.4 1.180 ! Near Maximum !
+00.0 106 43.00 2882 2342 61195 9250 98.0 1.147 !DANGEROUS LOAD-DO NOT USE!
+02.0 108 43.86 2938 2433 65310 9384 98.6 1.115 !DANGEROUS LOAD-DO NOT USE!
+04.0 110 44.72 2993 2527 69724 9506 99.0 1.084 !DANGEROUS LOAD-DO NOT USE!
+06.0 113 45.58 3049 2621 74466 9613 99.4 1.054 !DANGEROUS LOAD-DO NOT USE!
+08.0 115 46.44 3104 2717 79568 9705 99.6 1.025 !DANGEROUS LOAD-DO NOT USE!
+10.0 117 47.30 3159 2815 85064 9781 99.8 0.997 !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 43.00 3005 2547 72302 9080 100.0 1.070 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 106 43.00 2716 2080 50371 8988 92.3 1.247

 

[BruceP]

Cartridge : .260 Rem
Bullet : .264, 120, Barnes 'TTSX'BT S 30242
Useable Case Capaci: 46.227 grain H2O = 3.001 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H4350 *T

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 83 34.40 2310 1422 29347 7149 86.4 1.547
-18.0 85 35.26 2366 1492 31249 7386 87.7 1.507
-16.0 87 36.12 2423 1564 33273 7619 88.9 1.467
-14.0 89 36.98 2479 1637 35427 7847 90.1 1.429
-12.0 91 37.84 2535 1713 37721 8069 91.2 1.390
-10.0 93 38.70 2592 1790 40168 8284 92.3 1.351
-08.0 95 39.56 2648 1869 42776 8491 93.3 1.312
-06.0 97 40.42 2705 1949 45556 8690 94.2 1.275
-04.0 99 41.28 2761 2032 48534 8881 95.1 1.239
-02.0 101 42.14 2818 2116 51688 9061 95.9 1.204 ! Near Maximum !
+00.0 103 43.00 2874 2202 55039 9231 96.6 1.171 ! Near Maximum !
+02.0 105 43.86 2931 2289 58619 9390 97.3 1.138 ! Near Maximum !
+04.0 107 44.72 2987 2378 62448 9537 97.9 1.107 !DANGEROUS LOAD-DO NOT USE!
+06.0 109 45.58 3044 2468 66546 9672 98.4 1.077 !DANGEROUS LOAD-DO NOT USE!
+08.0 111 46.44 3100 2560 70938 9793 98.9 1.048 !DANGEROUS LOAD-DO NOT USE!
+10.0 113 47.30 3156 2654 75650 9900 99.2 1.019 !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 43.00 3010 2414 65086 9212 99.7 1.090 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 103 43.00 2699 1941 45308 8835 89.9 1.275

 

[deerhntr]

Bruce,

Thank You. Much Appreciated!

Russ

 

[BruceP]

You're Welcome

Bruce

 

[BruceP]

Deerhntr noticed that in my original QL data posts that I had left the COAL set to the length of my 260 Remington loads and not standard COAL. I have corrected the data and anyone who may have copied this can recopy to correct this. This shouldn't be a problem for someone working up to a max load in their firearm but just in case. The pressures did change but not by as much as the powder lot to lot variation at the bottom of the QL charts.

Thanks Deerhntr for bringing this to my attention

Bruce