Help with 220 grain Sierra game kings in 325

Fire Hawk · Jan 20, 2014

So my little package arrived from UPS today. I am now anxious to begin load development for my 325 wsm. Anyone have the ability to run some quick load data for me? I am shooting a Kimber Montana with Winchester brass and I am looking for data with RE17, IMR4007ssc, H4350, and Ramshot Big Game. I have some slower stuff too. Have WLRM and CCI250 primers to work with.

Thank you for the help!

FH

Mountain Goat · Jan 20, 2014

I'd lean toward H4350 to start. That is a proven powder in the 325WSM. I've only loded for a few, and all liked H4350 without much fuss.

wildgene · Jan 21, 2014

...if you call Sierra they will e-mail you the .325 WSM data sheets that aren't in the 5th edition. They don't have RL-17 listed as a powder, but will give you recommendations (63grs. RL-17 @2800fps is their "Max. Load"). I chronyed mine @ 2790 w/ good es/sd's, & very good accuracy, RL-17 has given me very good MV's, consistently above most "listed" powders in most of my WSM/ WSSM's...

DrMike · Jan 21, 2014

Code:

Cartridge          : .325 WSM
Bullet             : .323, 220, Sierra SPBT 2420
Useable Case Capaci: 70.011 grain H2O = 4.546 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-17

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   77    51.84   2311    2609   32720   8509     98.5    1.592
-18.0   78    53.14   2365    2733   34913   8693     99.1    1.551
-16.0   80    54.43   2419    2857   37253   8860     99.5    1.511
-14.0   82    55.73   2472    2984   39750   9009     99.8    1.466
-12.0   84    57.02   2524    3112   42416   9138    100.0    1.422
-10.0   86    58.32   2576    3242   45264   9247    100.0    1.380
-08.0   88    59.62   2627    3372   48307   9349    100.0    1.341
-06.0   90    60.91   2678    3503   51564   9449    100.0    1.302
-04.0   92    62.21   2728    3636   55050   9546    100.0    1.265  ! Near Maximum !
-02.0   94    63.50   2778    3769   58783   9640    100.0    1.229  ! Near Maximum !
+00.0   96    64.80   2827    3904   62788   9732    100.0    1.195  ! Near Maximum !
+02.0   98    66.10   2876    4040   67073   9820    100.0    1.162  !DANGEROUS LOAD-DO NOT USE!
+04.0  100    67.39   2924    4178   71699   9906    100.0    1.130  !DANGEROUS LOAD-DO NOT USE!
+06.0  101    68.69   2973    4317   76629   9988    100.0    1.099  !DANGEROUS LOAD-DO NOT USE!
+08.0  103    69.98   3021    4458   81906  10067    100.0    1.069  !DANGEROUS LOAD-DO NOT USE!
+10.0  105    71.28   3069    4600   87568  10142    100.0    1.041  !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     96    64.80   2914    4149   76295   9385    100.0    1.113  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     96    64.80   2692    3541   50509  10206     99.7    1.304

Code:

Cartridge          : .325 WSM
Bullet             : .323, 220, Sierra SPBT 2420
Useable Case Capaci: 70.011 grain H2O = 4.546 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : IMR 4007 SSC

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    49.04   2205    2376   33782   7572     93.1    1.621
-18.0   77    50.27   2257    2488   35927   7786     94.0    1.580
-16.0   79    51.49   2308    2601   38198   7993     94.9    1.538
-14.0   81    52.72   2358    2717   40602   8192     95.7    1.492
-12.0   82    53.94   2409    2835   43149   8384     96.5    1.449
-10.0   84    55.17   2460    2955   45847   8566     97.2    1.408
-08.0   86    56.40   2510    3077   48707   8739     97.8    1.369
-06.0   88    57.62   2560    3201   51739   8901     98.3    1.331
-04.0   90    58.85   2610    3327   54956   9053     98.8    1.295  ! Near Maximum !
-02.0   92    60.07   2659    3454   58371   9194     99.1    1.259  ! Near Maximum !
+00.0   94    61.30   2708    3583   61998   9323     99.5    1.226  ! Near Maximum !
+02.0   96    62.53   2757    3714   65854   9440     99.7    1.193  !DANGEROUS LOAD-DO NOT USE!
+04.0   97    63.75   2806    3846   69957   9544     99.9    1.161  !DANGEROUS LOAD-DO NOT USE!
+06.0   99    64.98   2854    3980   74327   9634    100.0    1.131  !DANGEROUS LOAD-DO NOT USE!
+08.0  101    66.20   2902    4115   78986   9711    100.0    1.102  !DANGEROUS LOAD-DO NOT USE!
+10.0  103    67.43   2950    4251   83959   9781    100.0    1.073  !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    61.30   2805    3844   72204   9027    100.0    1.148  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     94    61.30   2572    3231   51894   9257     95.5    1.328

Code:

Cartridge          : .325 WSM
Bullet             : .323, 220, Sierra SPBT 2420
Useable Case Capaci: 70.011 grain H2O = 4.546 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Ramshot Big Game

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   72    49.36   2257    2489   33517   7809     97.9    1.602
-18.0   74    50.59   2307    2600   35678   7986     98.5    1.563
-16.0   75    51.83   2356    2712   37944   8152     99.0    1.523
-14.0   77    53.06   2405    2826   40332   8305     99.4    1.480
-12.0   79    54.30   2454    2941   42857   8445     99.7    1.438
-10.0   81    55.53   2502    3057   45528   8572     99.9    1.399
-08.0   83    56.76   2549    3174   48354   8684    100.0    1.361
-06.0   84    58.00   2596    3292   51343   8783    100.0    1.325
-04.0   86    59.23   2642    3411   54506   8878    100.0    1.290  ! Near Maximum !
-02.0   88    60.47   2688    3530   57855   8971    100.0    1.256  ! Near Maximum !
+00.0   90    61.70   2734    3650   61401   9061    100.0    1.224  ! Near Maximum !
+02.0   92    62.93   2779    3772   65157   9150    100.0    1.193  !DANGEROUS LOAD-DO NOT USE!
+04.0   93    64.17   2823    3894   69139   9236    100.0    1.162  !DANGEROUS LOAD-DO NOT USE!
+06.0   95    65.40   2867    4017   73362   9320    100.0    1.134  !DANGEROUS LOAD-DO NOT USE!
+08.0   97    66.64   2911    4141   77845   9401    100.0    1.106  !DANGEROUS LOAD-DO NOT USE!
+10.0   99    67.87   2955    4266   82607   9480    100.0    1.079  !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     90    61.70   2813    3864   72484   8748    100.0    1.147  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     90    61.70   2613    3334   50381   9416     99.2    1.327

Fire Hawk · Jan 21, 2014

I love this site! Thank you so much for your help.

FH

6mm Remington · Jan 21, 2014

Fire Hawk IMR4350 worked very well for my buddy. I load his 325 WSM for him using 200 gr. Partitions and Accubonds. It was easy to get a load it liked for each of the two bullets. I imagine that H4350 would work equally as well.
David

wildgene · Jan 21, 2014

...looks like maybe I'll try to sneak up one more grain, Dr. Mike...

DrMike · Jan 21, 2014

I'm using RL19 with my 220 grain GKs. They are giving me great accuracy and fine velocity. However, I almost always wind up with 200 grain PTs with a charge of Big Game. They give excellent accuracy and superb velocity.

SJB358 · Jan 21, 2014

wildgene":1x7ft1z7 said:
...if you call Sierra they will e-mail you the .325 WSM data sheets that aren't in the 5th edition. They don't have RL-17 listed as a powder, but will give you recommendations (63grs. RL-17 @2800fps is their "Max. Load"). I chronyed mine @ 2790 w/ good es/sd's, & very good accuracy, RL-17 has given me very good MV's, consistently above most "listed" powders in most of my WSM/ WSSM's...

You really know how to make it hard on a guy Gene!