QL Data - 6.5 PRC Dr. Mike, please

Ralt71 · 2025-08-30T10:18:43-0700

With some of the trials I have done (at the recommendation from this forum and JD) seating deeper into the case, I am going back to the drawing board on my 6.5 PRC. I'm going to start at .050 (ogive) off the lands. Since I'm doing this, I was going to test some of the other powders I typically like since I'm not sure the H1000 is giving me all the setup has to offer.

Here is what I have;
6.5 PRC
AccuBond 140gr
WLRM Primers
20" Barrel

Would like to double check H1000
Also check
H4350
IMR4350
N165

DrMike · 2025-08-30T10:31:46-0700

Code:

Cartridge          : 6.5 PRC
Bullet             : .264, 140, Nosler AccuBond 57873
Useable Case Capaci: 59.938 grain H2O = 3.892 cm³
Cartridge O.A.L. L6: 2.955 inch = 75.06 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : Hodgdon H1000 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0   99    54.00   2560    2037   44085  14253     94.0    1.255
-09.0  100    54.60   2594    2091   45716  14447     94.6    1.233
-08.0  101    55.20   2627    2146   47413  14634     95.2    1.211
-07.0  102    55.80   2662    2202   49181  14813     95.8    1.190
-06.0  103    56.40   2696    2259   51027  14986     96.4    1.169
-05.0  104    57.00   2730    2317   52949  15149     96.9    1.148
-04.0  105    57.60   2764    2375   54957  15305     97.3    1.128
-03.0  106    58.20   2799    2435   57051  15452     97.8    1.108  ! Near Maximum !
-02.0  108    58.80   2833    2495   59240  15590     98.2    1.088  ! Near Maximum !
-01.0  109    59.40   2868    2556   61524  15718     98.5    1.069  ! Near Maximum !
+00.0  110    60.00   2902    2618   63916  15837     98.8    1.050  ! Near Maximum !
+01.0  111    60.60   2937    2681   66416  15945     99.1    1.032  !DANGEROUS LOAD-DO NOT USE!
+02.0  112    61.20   2971    2744   69033  16042     99.4    1.013  !DANGEROUS LOAD-DO NOT USE!
+03.0  113    61.80   3006    2809   71773  16129     99.6    0.995  !DANGEROUS LOAD-DO NOT USE!
+04.0  114    62.40   3041    2874   74645  16204     99.7    0.977  !DANGEROUS LOAD-DO NOT USE!
+05.0  115    63.00   3075    2940   77659  16267     99.9    0.960  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    110    60.00   2986    2773   70831  15674     99.9    1.004  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    110    60.00   2802    2441   57505  15706     96.2    1.102  ! Near Maximum !

DrMike · 2025-08-30T10:32:43-0700

Code:

Cartridge          : 6.5 PRC
Bullet             : .264, 140, Nosler AccuBond 57873
Useable Case Capaci: 59.938 grain H2O = 3.892 cm³
Cartridge O.A.L. L6: 2.955 inch = 75.06 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : Hodgdon H4350 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0   86    46.35   2538    2002   47124  12872     97.4    1.234
-09.0   87    46.87   2564    2044   48526  13011     97.7    1.217
-08.0   88    47.38   2590    2086   49967  13145     98.0    1.200
-07.0   89    47.90   2616    2128   51447  13275     98.3    1.183
-06.0   90    48.41   2642    2170   52969  13402     98.6    1.167
-05.0   91    48.93   2668    2213   54533  13524     98.8    1.151
-04.0   91    49.44   2694    2256   56140  13641     99.0    1.135  ! Near Maximum !
-03.0   92    49.96   2720    2300   57792  13754     99.2    1.119  ! Near Maximum !
-02.0   93    50.47   2746    2344   59490  13863     99.4    1.104  ! Near Maximum !
-01.0   94    50.99   2771    2388   61236  13967     99.5    1.089  ! Near Maximum !
+00.0   95    51.50   2797    2432   63032  14066     99.7    1.074  ! Near Maximum !
+01.0   96    52.02   2822    2476   64878  14160     99.8    1.060  !DANGEROUS LOAD-DO NOT USE!
+02.0   97    52.53   2848    2521   66777  14250     99.9    1.046  !DANGEROUS LOAD-DO NOT USE!
+03.0   98    53.05   2873    2566   68730  14334     99.9    1.032  !DANGEROUS LOAD-DO NOT USE!
+04.0   99    53.56   2898    2611   70739  14413    100.0    1.018  !DANGEROUS LOAD-DO NOT USE!
+05.0  100    54.08   2923    2657   72806  14486    100.0    1.005  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba     95    51.50   2853    2530   68098  13878    100.0    1.037  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     95    51.50   2731    2318   57962  14092     98.3    1.117  ! Near Maximum !

DrMike · 2025-08-30T10:33:26-0700

Code:

Cartridge          : 6.5 PRC
Bullet             : .264, 140, Nosler AccuBond 57873
Useable Case Capaci: 59.938 grain H2O = 3.892 cm³
Cartridge O.A.L. L6: 2.955 inch = 75.06 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : IMR 4350

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0   84    46.35   2543    2011   47423  12882     97.6    1.230
-09.0   85    46.87   2569    2052   48834  13018     97.9    1.213
-08.0   86    47.38   2595    2094   50283  13151     98.2    1.196
-07.0   87    47.90   2621    2136   51773  13280     98.5    1.180
-06.0   88    48.41   2647    2179   53304  13404     98.7    1.163
-05.0   89    48.93   2673    2222   54877  13524     98.9    1.147
-04.0   90    49.44   2699    2265   56494  13640     99.1    1.131  ! Near Maximum !
-03.0   91    49.96   2725    2308   58156  13751     99.3    1.116  ! Near Maximum !
-02.0   92    50.47   2751    2352   59865  13858     99.5    1.101  ! Near Maximum !
-01.0   93    50.99   2776    2396   61621  13960     99.6    1.086  ! Near Maximum !
+00.0   94    51.50   2802    2440   63427  14057     99.7    1.071  ! Near Maximum !
+01.0   95    52.02   2827    2484   65284  14149     99.8    1.057  !DANGEROUS LOAD-DO NOT USE!
+02.0   96    52.53   2852    2529   67194  14236     99.9    1.043  !DANGEROUS LOAD-DO NOT USE!
+03.0   97    53.05   2878    2574   69159  14318    100.0    1.029  !DANGEROUS LOAD-DO NOT USE!
+04.0   97    53.56   2903    2619   71180  14395    100.0    1.015  !DANGEROUS LOAD-DO NOT USE!
+05.0   98    54.08   2928    2665   73259  14466    100.0    1.002  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba     94    51.50   2857    2537   68511  13859    100.0    1.034  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     94    51.50   2736    2327   58337  14096     98.5    1.113  ! Near Maximum !

DrMike · 2025-08-30T10:34:38-0700

Code:

Cartridge          : 6.5 PRC
Bullet             : .264, 140, Nosler AccuBond 57873
Useable Case Capaci: 59.938 grain H2O = 3.892 cm³
Cartridge O.A.L. L6: 2.955 inch = 75.06 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : Vihtavuori N165 *C

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0   93    50.85   2530    1989   45926  13116     96.7    1.258
-09.0   94    51.42   2559    2035   47477  13261     97.2    1.238
-08.0   95    51.98   2588    2082   49081  13402     97.5    1.218
-07.0   96    52.55   2617    2128   50739  13537     97.9    1.199
-06.0   97    53.11   2646    2176   52454  13667     98.2    1.180
-05.0   98    53.68   2674    2224   54229  13791     98.5    1.162
-04.0   99    54.24   2703    2272   56065  13910     98.8    1.143  ! Near Maximum !
-03.0  100    54.81   2732    2321   57965  14022     99.0    1.125  ! Near Maximum !
-02.0  101    55.37   2761    2370   59932  14128     99.2    1.108  ! Near Maximum !
-01.0  102    55.94   2790    2420   61968  14228     99.4    1.091  ! Near Maximum !
+00.0  103    56.50   2819    2470   64076  14322     99.6    1.074  ! Near Maximum !
+01.0  104    57.07   2847    2520   66261  14408     99.7    1.057  !DANGEROUS LOAD-DO NOT USE!
+02.0  105    57.63   2876    2571   68524  14488     99.8    1.041  !DANGEROUS LOAD-DO NOT USE!
+03.0  106    58.20   2904    2622   70870  14560     99.9    1.025  !DANGEROUS LOAD-DO NOT USE!
+04.0  108    58.76   2933    2674   73303  14626    100.0    1.009  !DANGEROUS LOAD-DO NOT USE!
+05.0  109    59.33   2961    2726   75826  14683    100.0    0.993  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    103    56.50   2883    2585   70194  14100    100.0    1.031  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    103    56.50   2741    2336   58007  14346     98.0    1.122  ! Near Maximum !

Ralt71 · 2025-08-30T11:27:09-0700

I owe you a beer or two! Thank you so much

sako2 · 2025-08-30T11:54:57-0700

If you haven't tried Ramshot Magmun give it a try.

Ralt71 · 2025-08-30T12:25:37-0700

sako2 said:
If you haven't tried Ramshot Magmun give it a try.

As stupid as this sounds, I have started staying away from ball powders because I can't stand the mess they make on my load bench and how much they seem to change POI with temperature.

Blkram · 2025-08-30T21:49:27-0700

You might also want to look at the Vihtavouri 500 series powders for a little extra punch over the 100 series powders.
MagPro is another powder that shows great potential in the 6.5 PRC with the 140 gr AccuBonds.

sako2 · 2025-08-31T03:34:47-0700

Ralt71 said:
As stupid as this sounds, I have started staying away from ball powders because I can't stand the mess they make on my load bench and how much they seem to change POI with temperature.

Yes they make a mess when using a autodispenser.