IMR7828 SSC in 270 WSM

[Joec7651]

I've got a ladder loaded with 7828, WLRM primers, and 130gr Partitions for my 270 WSM. Started at 63 grains and stopped it at 67.5. 63 grains isn't the absolute minimum load listed for Hodgdon, but should be plenty safe as a start. I'm curious if any of you have any loads with this powder logged in your notes that faired well for you. I decided to try 7828 simply because I have 9 lbs and it seems to be a very good burn rate for the cartridge. Sorta threw a dart at my powder locker and that's what it hit. This will be my deer load for this fall, or at least this bullet with maybe a different powder if it doesn't do well. Also leaning heavily towards RL23. I've got too many options and am indecisive. Thanks in advance to you all.

 

[Joec7651]

This may be a Quickload I use imediately as well.

QL Request 270 WSM RL-23

Would someone run the data for: 270 WSM 130 E-Tip Reloder 23 24" bbl Fed 215 And if it ain't too much effort, compare it to Magpro and Rl-22 Thanks a million! Im slowly figuring out these e-tips are a creature unto themselves when it comes to load data..Nosler is spot on saying start low and...

forum.nosler.com

 

[DrMike]

Cartridge          : .270 WSM
Bullet             : .277, 130, Nosler E-Tip 59298
Useable Case Capaci: 71.244 grain H2O = 4.626 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-23 *C *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   93    59.94   2962    2532   45074  11414    100.0    1.305
-09.0   94    60.61   2992    2584   46613  11475    100.0    1.285
-08.0   95    61.27   3022    2637   48207  11536    100.0    1.266
-07.0   96    61.94   3053    2690   49860  11596    100.0    1.246
-06.0   97    62.60   3082    2743   51573  11654    100.0    1.227
-05.0   98    63.27   3112    2796   53339  11712    100.0    1.209
-04.0  100    63.94   3142    2849   55159  11770    100.0    1.191  ! Near Maximum !
-03.0  101    64.60   3171    2903   57034  11826    100.0    1.173  ! Near Maximum !
-02.0  102    65.27   3201    2957   58970  11881    100.0    1.156  ! Near Maximum !
-01.0  103    65.93   3230    3011   60972  11936    100.0    1.138  ! Near Maximum !
+00.0  104    66.60   3259    3066   63043  11989    100.0    1.122  ! Near Maximum !
+01.0  105    67.27   3288    3121   65185  12042    100.0    1.105  !DANGEROUS LOAD-DO NOT USE!
+02.0  106    67.93   3317    3176   67401  12093    100.0    1.089  !DANGEROUS LOAD-DO NOT USE!
+03.0  107    68.60   3346    3231   69694  12144    100.0    1.073  !DANGEROUS LOAD-DO NOT USE!
+04.0  108    69.26   3374    3286   72067  12193    100.0    1.057  !DANGEROUS LOAD-DO NOT USE!
+05.0  109    69.93   3403    3342   74524  12242    100.0    1.042  !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    104    66.60   3319    3180   69749  11778    100.0    1.077  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    104    66.60   3185    2928   56331  12245    100.0    1.174  ! Near Maximum !

 

[DrMike]

Cartridge          : .270 WSM
Bullet             : .277, 130, Nosler E-Tip 59298
Useable Case Capaci: 71.244 grain H2O = 4.626 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length      : 24.0 inch = 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 64000 psi, or 441 MPa
or a maximum loading ratio or filling of 110 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

17 loads produced a Loading Ratio below user-defined minimum of 90%. These powders have been skipped.
Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Accurate MAGPRO                    102.3     71.5     4.63    3325    97.2    64000   14045   1.110  ! Near Maximum !
Alliant Reloder-22 *C              102.4     68.0     4.41    3313    99.5    64000   13450   1.108  ! Near Maximum !
Alliant Reloder-23 *C *T           104.1     66.9     4.34    3272   100.0    64000   12013   1.114  ! Near Maximum !

 

[Joec7651]

Between my 7828 ladder test, and Mikes kindness with Quickload I should have arrived at a load by Thursday if the planets align. The range opens Wednesday so I can fire the ladder for 7828, and RL23, and Ill shoot the results for groups on Thursday.

 

[Pineman]

Joe, Good luck with the ladder test. I've ran the most tests with magpro so will be interested in hearing how the other 2 powders work. Long live the 270WSM.