270 WSM 150 ABLR quickload question

bbearhntr

Handloader
Apr 10, 2011
553
0
I was wondering if anyone with a little free time might be able to help me pick a powder to use in my 270 WSM with 150g ABLR's. I use Norma brass if that makes a difference. I plan on using this rifle and bullet on a Montana elk hunt this fall. Thanks for everyone's input in advance.
 

Dwh7271

Handloader
Nov 18, 2013
2,461
1
RL26. Should get around 3100 no problem. Just ran it for another guy yesterday.

Code:
Cartridge          : .270 WSM
Bullet             : .277, 150, Nosler Accubond LR 58836 G7
Useable Case Capaci: 70.569 grain H2O = 4.582 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-26 ?

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.451% 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

-04.5   91    63.44   3013    3025   55313  12727    100.0    1.268  ! Near Maximum !
-04.1   91    63.74   3027    3052   56197  12754    100.0    1.259  ! Near Maximum !
-03.6   92    64.04   3040    3079   57095  12781    100.0    1.249  ! Near Maximum !
-03.2   92    64.34   3054    3106   58007  12808    100.0    1.241  ! Near Maximum !
-02.7   92    64.64   3067    3133   58933  12834    100.0    1.232  ! Near Maximum !
-02.3   93    64.94   3081    3161   59874  12861    100.0    1.223  ! Near Maximum !
-01.8   93    65.24   3094    3188   60830  12887    100.0    1.214  ! Near Maximum !
-01.4   94    65.54   3107    3216   61801  12913    100.0    1.206  ! Near Maximum !
-00.9   94    65.84   3121    3243   62787  12938    100.0    1.197  ! Near Maximum !
-00.5   95    66.14   3134    3271   63789  12964    100.0    1.188  !DANGEROUS LOAD-DO NOT USE!
+00.0   95    66.44   3147    3299   64807  12989    100.0    1.180  !DANGEROUS LOAD-DO NOT USE!
+00.5   95    66.74   3160    3326   65842  13014    100.0    1.172  !DANGEROUS LOAD-DO NOT USE!
+00.9   96    67.04   3173    3354   66892  13039    100.0    1.163  !DANGEROUS LOAD-DO NOT USE!
+01.4   96    67.34   3187    3382   67960  13064    100.0    1.155  !DANGEROUS LOAD-DO NOT USE!
+01.8   97    67.64   3200    3410   69045  13088    100.0    1.147  !DANGEROUS LOAD-DO NOT USE!
+02.3   97    67.94   3213    3438   70147  13112    100.0    1.139  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 3% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 3% relative to nominal value:
+Ba     95    66.44   3186    3381   69335  12833    100.0    1.148  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 3% relative to nominal value:
-Ba     95    66.44   3103    3206   60302  13164    100.0    1.215  ! Near Maximum !

I can get you a full powder run later. I'm not at home. I copied and pasted from last nights email.
 

SJB358

Ballistician
Dec 24, 2006
31,291
541
I’m using 26 in my 270 WSM with 150 Partitions and getting an easy 3150 and excellent accuracy. Thinking that 150 ABLR would be a WICKED load for you.
 

bbearhntr

Handloader
Apr 10, 2011
553
0
I bought an 8 lb jug of RL 26 to give a whirl. I had been really satisfied with RL 22 and 130g accubonds up to this point. I just figure 150 g ABLR would be a better choice for a critter bigger than a deer. Does anyone have a quickload projection for RL 26 and an ABLR?
 

SJB358

Ballistician
Dec 24, 2006
31,291
541
Cartridge : .270 WSM
Bullet : .277, 150, Nosler AccuBond LR 58836 G7
Useable Case Capaci: 70.569 grain H2O = 4.582 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-26

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.741% 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

-07.4 89 62.50 2922 2845 48963 12820 100.0 1.336
-06.7 90 63.00 2946 2890 50286 12865 100.0 1.320
-05.9 91 63.50 2969 2936 51643 12910 100.0 1.304
-05.2 92 64.00 2992 2982 53037 12954 100.0 1.288
-04.4 92 64.50 3015 3028 54467 12997 100.0 1.273
-03.7 93 65.00 3038 3074 55935 13040 100.0 1.257 ! Near Maximum !
-03.0 94 65.50 3061 3121 57443 13082 100.0 1.242 ! Near Maximum !
-02.2 94 66.00 3084 3167 58991 13124 100.0 1.227 ! Near Maximum !
-01.5 95 66.50 3106 3214 60581 13165 100.0 1.213 ! Near Maximum !
-00.7 96 67.00 3129 3261 62214 13206 100.0 1.198 ! Near Maximum !
+00.0 97 67.50 3151 3308 63891 13246 100.0 1.184 ! Near Maximum !
+00.7 97 68.00 3174 3355 65615 13285 100.0 1.170 !DANGEROUS LOAD-DO NOT USE!
+01.5 98 68.50 3196 3403 67385 13324 100.0 1.156 !DANGEROUS LOAD-DO NOT USE!
+02.2 99 69.00 3219 3451 69205 13362 100.0 1.142 !DANGEROUS LOAD-DO NOT USE!
+03.0 99 69.50 3241 3499 71075 13399 100.0 1.129 !DANGEROUS LOAD-DO NOT USE!
+03.7 100 70.00 3263 3547 72997 13436 100.0 1.116 !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 97 67.50 3273 3568 79257 12752 100.0 1.086 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 97 67.50 2963 2924 49143 13854 99.4 1.318
 

SJB358

Ballistician
Dec 24, 2006
31,291
541
Shoot, I didn’t even notice Dewey beat me to it.

I ran RL25 a bit with 150 ABLRS when they first came out. Great speed but I had erratic accuracy. I think I probably needed to seat them deeper. They shoot really well out of my 270 Winchester.
 
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