264maq QL request

[Creedmore]

I've been doing barrel break-in and load development on my Dad's Mauser 98 re-barrel. It is a 26" X-caliber 8 twist. Seems like it wants to be a shooter.

Anyway, I shot 50 rounds of new Norma brass on Saturday during break-in. Then on Sunday I sized, trimmed, and started doing load development. After shooting these, I measured 10 cases for water capacity, and the average was 88.3gr.

I'd like to get a QL workup on 130 and 140gr Accubonds. Here is the load data and velocity results over my Oehler 35:

Norma brass
GM 215M primer
64g Retumbo
140 AccuBond
2950fps average

Norma brass
GM 215M primer
59gr Alliant 4000-MR
130 AccuBond
2985fps average

I'm almost at book max with the 140, but haven't seen the slightest hint of pressure yet, and still have lots of case capacity left.

Thanks!
-Gene

 

[DrMike]

These are, of course, default settings.

artridge          : .264 Win. Mag.
Bullet             : .264, 140, Nosler AccuBond 39457
Useable Case Capaci: 74.854 grain H2O = 4.860 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon Retumbo

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   74    51.20   2183    1481   22617  10848     88.4    1.868
-18.0   76    52.48   2240    1560   24023  11279     90.1    1.826
-16.0   77    53.76   2298    1642   25521  11697     91.7    1.784
-14.0   79    55.04   2357    1727   27116  12099     93.2    1.742
-12.0   81    56.32   2416    1814   28812  12484     94.5    1.702
-10.0   83    57.60   2475    1905   30619  12847     95.8    1.662
-08.0   85    58.88   2535    1997   32545  13187     96.8    1.623
-06.0   87    60.16   2594    2092   34596  13501     97.8    1.585
-04.0   89    61.44   2654    2189   36785  13786     98.5    1.547
-02.0   90    62.72   2713    2288   39118  14041     99.2    1.503
+00.0   92    64.00   2772    2389   41610  14263     99.6    1.459
+02.0   94    65.28   2831    2491   44271  14451     99.9    1.416
+04.0   96    66.56   2889    2594   47115  14603    100.0    1.375
+06.0   98    67.84   2946    2699   50156  14730    100.0    1.335
+08.0  100    69.12   3003    2804   53410  14852    100.0    1.296  ! Near Maximum !
+10.0  101    70.40   3060    2910   56895  14971    100.0    1.259  ! Near Maximum !

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     92    64.00   2930    2669   51692  13753    100.0    1.329
Data for burning rate decreased by 10% relative to nominal value:
-Ba     92    64.00   2548    2018   33285  13716     92.8    1.605

Again. using default settings, there is room to throttle up the powder charge.

Cartridge          : .264 Win. Mag.
Bullet             : .264, 140, Nosler AccuBond 39457
Useable Case Capaci: 74.854 grain H2O = 4.860 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon Retumbo

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    57.60   2475    1905   30619  12847     95.8    1.662
-18.0   85    59.04   2542    2009   32794  13228     97.0    1.618
-16.0   87    60.48   2609    2116   35131  13575     98.0    1.575
-14.0   89    61.92   2676    2226   37642  13886     98.8    1.532
-12.0   91    63.36   2743    2338   40344  14156     99.4    1.480
-10.0   93    64.80   2809    2453   43252  14385     99.8    1.431
-08.0   95    66.24   2874    2568   46385  14569    100.0    1.385
-06.0   98    67.68   2939    2686   49764  14714    100.0    1.340
-04.0  100    69.12   3003    2804   53410  14852    100.0    1.296  ! Near Maximum !
-02.0  102    70.56   3067    2924   57348  14985    100.0    1.254  ! Near Maximum !
+00.0  104    72.00   3130    3045   61595  15114    100.0    1.214  ! Near Maximum !
+02.0  106    73.44   3192    3167   66224  15237    100.0    1.175  !DANGEROUS LOAD-DO NOT USE!
+04.0  108    74.88   3253    3291   71220  15355    100.0    1.137  !DANGEROUS LOAD-DO NOT USE!
+06.0  110    76.32   3315    3416   76593  15468    100.0    1.101  !DANGEROUS LOAD-DO NOT USE!
+08.0  112    77.76   3376    3543   82387  15574    100.0    1.066  !DANGEROUS LOAD-DO NOT USE!
+10.0  114    79.20   3437    3672   88645  15675    100.0    1.033  !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    104    72.00   3258    3299   76609  14573    100.0    1.112  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    104    72.00   2932    2672   48464  15695     99.0    1.347

The data set for Alliant 4000MR is not yet included.

 

[SJB358]

A 26" barreled 264 should easily get over 3100 with 140's using Retumbo, RL25's and similar. 3250-3300 with the same powders is pretty easy as well. I'd keep adding the coal to the load. You've got room to work.

 

[Creedmore]

Thanks, fellas. I figured there was room for more, wanted to be sure.

 

[OU812]

I'm at 66.0 grains of Retumbo with a 140 AccuBond and fed 215. When up to 67 or 67.5, don't recall which and got pressure signs so I settled at 66.0

 

[Creedmore]

Now that the season is over, tinkering on this load workup again with some different bullets.

Looks like she really likes RL-22 and a 129g ABLR.

Dr.Mike, can you run the QL on this combination? Thanks!

 

[DrMike]

Cartridge          : .264 Win. Mag.
Bullet             : .264, 129, Nosler AccuBond LR 58943 G7
Useable Case Capaci: 75.500 grain H2O = 4.902 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-22

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   75    52.80   2564    1883   32724  12136     93.3    1.584
-18.0   77    54.12   2627    1977   34917  12505     94.5    1.544
-16.0   79    55.44   2690    2073   37233  12859     95.5    1.505
-14.0   81    56.76   2754    2172   39691  13195     96.5    1.458
-12.0   83    58.08   2817    2273   42298  13512     97.3    1.414
-10.0   84    59.40   2880    2375   45064  13809     98.1    1.371
-08.0   86    60.72   2942    2480   47997  14083     98.7    1.330
-06.0   88    62.04   3005    2586   51108  14334     99.2    1.291
-04.0   90    63.36   3066    2693   54409  14560     99.6    1.253  ! Near Maximum !
-02.0   92    64.68   3128    2802   57912  14759     99.8    1.217  ! Near Maximum !
+00.0   94    66.00   3188    2912   61631  14932    100.0    1.182  ! Near Maximum !
+02.0   96    67.32   3249    3023   65580  15076    100.0    1.148  !DANGEROUS LOAD-DO NOT USE!
+04.0   98    68.64   3308    3135   69776  15210    100.0    1.116  !DANGEROUS LOAD-DO NOT USE!
+06.0   99    69.96   3367    3247   74237  15340    100.0    1.084  !DANGEROUS LOAD-DO NOT USE!
+08.0  101    71.28   3426    3361   78983  15466    100.0    1.054  !DANGEROUS LOAD-DO NOT USE!
+10.0  103    72.60   3484    3476   84036  15588    100.0    1.025  !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     94    66.00   3317    3151   73328  14436    100.0    1.093  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     94    66.00   3001    2580   50009  14929     96.6    1.299

 

[Creedmore]

Thank you, sir!