270 WSM 150 ABLR quickload question

bbearhntr · Apr 6, 2018

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 · Apr 6, 2018

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.

bbearhntr · Apr 6, 2018

Thank you very much!

SJB358 · Apr 7, 2018

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 · Apr 8, 2018

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 · Apr 8, 2018

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

bbearhntr · Apr 8, 2018

Thanks Scotty

bbearhntr · Apr 8, 2018

Oooops

thanks to both of you for posting the quickload info

SJB358 · Apr 9, 2018

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.