270Wby

[30-338]

I have 270Wby and on Rem action with Rock Creek 26" barrel. I've had good luck with 150gr ABLR,IMR-7828. I've got couple boxes 165gr ABLR and need some loading data using IMR-7828, maybe QL.

Thanks

 

[DrMike]

Unfortunately, my data set doesn't include the 165 grain ABLR. This should be included in the next update, I should imagine. The projection does allow data for the 150 grain ABLR, however. This would allow you to check the data you've already generated against the QL projection.

Cartridge          : .270 Weath. Mag.
Bullet             : .277, 150, Nosler Accubond LR 58836 G7
Useable Case Capaci: 72.698 grain H2O = 4.720 cm³
Cartridge O.A.L. L6: 3.295 inch = 83.69 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : IMR 7828

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   92    60.03   2860    2725   44728  11745     97.1    1.416
-09.0   93    60.70   2893    2787   46251  11867     97.5    1.394
-08.0   94    61.36   2925    2849   47827  11984     97.9    1.372
-07.0   95    62.03   2957    2912   49458  12095     98.2    1.351
-06.0   96    62.70   2989    2976   51150  12200     98.5    1.330
-05.0   97    63.37   3021    3040   52904  12300     98.8    1.310
-04.0   98    64.03   3053    3105   54719  12394     99.1    1.290  ! Near Maximum !
-03.0   99    64.70   3085    3170   56602  12482     99.3    1.270  ! Near Maximum !
-02.0  100    65.37   3117    3236   58555  12563     99.5    1.251  ! Near Maximum !
-01.0  101    66.03   3149    3302   60579  12638     99.6    1.232  ! Near Maximum !
+00.0  102    66.70   3180    3369   62683  12707     99.8    1.213  ! Near Maximum !
+01.0  103    67.37   3212    3436   64863  12769     99.9    1.195  !DANGEROUS LOAD-DO NOT USE!
+02.0  104    68.03   3243    3503   67127  12825     99.9    1.177  !DANGEROUS LOAD-DO NOT USE!
+03.0  105    68.70   3274    3571   69472  12873    100.0    1.159  !DANGEROUS LOAD-DO NOT USE!
+04.0  107    69.37   3305    3639   71896  12914    100.0    1.141  !DANGEROUS LOAD-DO NOT USE!
+05.0  108    70.04   3336    3708   74405  12952    100.0    1.124  !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    102    66.70   3315    3659   75908  12196    100.0    1.122  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    102    66.70   2985    2967   50533  12639     95.4    1.332

 

[FOTIS]

What's your twist rate

 

[FOTIS]

Also you can start at the minimum with the 150 ablr substitute the 165 and press on

 

[gerry]

Nosler combines data for the 160 gr PT and 165 gr ABLR for the 27 Nosler so you might be able to do the same. Start low of course and work up.

 

[remingtonman_25_06]

I would start low with the 160g NP data and work up from there.

 

[amassi]

If you don't have at least a 8.5 twist or faster your spinning your wheels

Sent from my SM-G892A using Tapatalk

 

[FOTIS]

If you don't have at least a 8.5 twist or faster your spinning your wheels

Sent from my SM-G892A using Tapatalk

That's why I asked what the twist is

 

[30-338]

I do appreiate the help. I'm going to get some 160gr and try those then I'll work on loads the 165gr ABLR.