looking for 270wsm load R-17

[mkcj]

Anyone have a load for 270WSM with R-17 and 140 AB? will be shot out of a Tikka T-3 if that matters. Thanks Mark.

 

[DrMike]

I haven't used the 140 AB with my 270 WSM; it works so well on moose and elk with the 130 grain E-Tip and R17 that I haven't had to use anything else. However, here is a QL projection:

Cartridge          : .270 WSM
Bullet             : .277, 140, Nosler AccuBond 54765
Useable Case Capaci: 71.442 grain H2O = 4.639 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   71    48.88   2606    2111   33581  10537     99.1    1.519
-18.0   73    50.10   2665    2207   35807  10753     99.5    1.483
-16.0   74    51.32   2723    2305   38175  10946     99.8    1.442
-14.0   76    52.55   2780    2403   40695  11115    100.0    1.400
-12.0   78    53.77   2837    2502   43377  11262    100.0    1.359
-10.0   80    54.99   2893    2602   46228  11402    100.0    1.320
-08.0   81    56.21   2949    2703   49229  11540    100.0    1.283
-06.0   83    57.43   3003    2804   52394  11675    100.0    1.247
-04.0   85    58.66   3057    2905   55744  11807    100.0    1.212  ! Near Maximum !
-02.0   87    59.88   3110    3007   59290  11937    100.0    1.179  ! Near Maximum !
+00.0   88    61.10   3163    3110   63045  12063    100.0    1.147  ! Near Maximum !
+02.0   90    62.32   3216    3214   67022  12186    100.0    1.117  !DANGEROUS LOAD-DO NOT USE!
+04.0   92    63.54   3267    3319   71237  12306    100.0    1.087  !DANGEROUS LOAD-DO NOT USE!
+06.0   94    64.77   3319    3424   75705  12423    100.0    1.059  !DANGEROUS LOAD-DO NOT USE!
+08.0   96    65.99   3370    3531   80444  12537    100.0    1.031  !DANGEROUS LOAD-DO NOT USE!
+10.0   97    67.21   3421    3638   85475  12647    100.0    1.005  !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     88    61.10   3257    3298   75186  11713    100.0    1.069  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     88    61.10   3021    2837   50866  12569    100.0    1.254

 

[DrMike]

I took another look at my notes and see that I've used quite a bit of H1000 and 140 grain Partitions in the past with excellent velocity and accuracy.

 

[mkcj]

Dr. this gun has never shot well with factory ammo, AB's or Barnes, my next step after the hand loaded AB's will be trying 140 partitions so I will keep the H1000 in mind, will that also work for a 180 in my other sons 300wsm? thank you

 

[DrMike]

H1000 would be too slow for your son's 300 WSM. A better choice for both rifles would be something with a burn rate near one of the 4350s. RL19 is one that immediately suggests itself to me; it has served me well in both cartridges.

Sample Projections with RL19:

Cartridge          : .300 WSM (CIP)
Bullet             : .308, 180, Nosler PART SP 16331
Useable Case Capaci: 72.076 grain H2O = 4.680 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-19

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   83    54.96   2405    2311   32357   8999     90.0    1.539
-18.0   85    56.33   2464    2427   34542   9288     91.2    1.500
-16.0   87    57.71   2524    2547   36872   9568     92.4    1.462
-14.0   89    59.08   2584    2669   39362   9838     93.5    1.416
-12.0   91    60.46   2644    2794   42022  10097     94.6    1.373
-10.0   93    61.83   2704    2922   44868  10344     95.5    1.332
-08.0   95    63.20   2764    3053   47912  10578     96.4    1.292
-06.0   97    64.58   2824    3187   51173  10798     97.1    1.254
-04.0   99    65.95   2884    3323   54668  11003     97.8    1.217  ! Near Maximum !
-02.0  101    67.33   2943    3462   58411  11191     98.4    1.181  ! Near Maximum !
+00.0  103    68.70   3003    3604   62398  11362     98.9    1.147  ! Near Maximum !
+02.0  105    70.07   3062    3747   66664  11515     99.3    1.113  !DANGEROUS LOAD-DO NOT USE!
+04.0  108    71.45   3121    3893   71242  11649     99.6    1.081  !DANGEROUS LOAD-DO NOT USE!
+06.0  110    72.82   3180    4041   76159  11763     99.8    1.051  !DANGEROUS LOAD-DO NOT USE!
+08.0  112    74.20   3238    4191   81447  11855    100.0    1.021  !DANGEROUS LOAD-DO NOT USE!
+10.0  114    75.57   3296    4343   87144  11927    100.0    0.992  !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    103    68.70   3133    3922   74434  11052    100.0    1.066  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    103    68.70   2823    3186   50848  11102     93.6    1.253

Cartridge          : .270 WSM
Bullet             : .277, 140, Nosler AccuBond 54765
Useable Case Capaci: 71.442 grain H2O = 4.639 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-19

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   78    51.20   2540    2005   33059  10321     92.0    1.531
-18.0   80    52.48   2601    2103   35247  10637     93.2    1.494
-16.0   82    53.76   2662    2203   37577  10942     94.2    1.457
-14.0   84    55.04   2723    2305   40055  11236     95.2    1.411
-12.0   86    56.32   2784    2410   42668  11515     96.1    1.370
-10.0   87    57.60   2845    2516   45424  11781     96.9    1.330
-08.0   89    58.88   2906    2625   48347  12031     97.6    1.291
-06.0   91    60.16   2966    2735   51452  12264     98.3    1.254
-04.0   93    61.44   3026    2847   54749  12479     98.8    1.218  ! Near Maximum !
-02.0   95    62.72   3086    2961   58252  12675     99.2    1.184  ! Near Maximum !
+00.0   97    64.00   3146    3076   61976  12852     99.6    1.151  ! Near Maximum !
+02.0   99    65.28   3205    3192   65937  13007     99.8    1.119  !DANGEROUS LOAD-DO NOT USE!
+04.0  101    66.56   3263    3310   70152  13141    100.0    1.088  !DANGEROUS LOAD-DO NOT USE!
+06.0  103    67.84   3321    3429   74642  13253    100.0    1.058  !DANGEROUS LOAD-DO NOT USE!
+08.0  105    69.12   3379    3549   79428  13352    100.0    1.030  !DANGEROUS LOAD-DO NOT USE!
+10.0  107    70.40   3436    3671   84534  13448    100.0    1.002  !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    64.00   3271    3326   73167  12459    100.0    1.071  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     97    64.00   2968    2739   50889  12690     95.3    1.256

 

[mkcj]

I can get just about any powder except RL-19 around here, I'm going to Eastern Wash. this weekend so I'll stop in a couple places and see if I can find some. One thing I do notice is the difference between QL and the Nosler reloading manual, I'm guessing Nosler is being overly cautious.

 

[DrMike]

Nosler is presenting pressure tested loads. They are not being overly cautious; they are being precise. QuickLoad is a great estimate of what one can expect. Remember that data varies depending on variables such as burn rates, chamber dimensions, etc. Just remember to work up safely, watching for pressure signs.

 

[Teknys]

I run RL17 in my WSMs and the QL is right there for the 140AB. Work up to the max. Pressure signs will come quick.

 

[2ndtimer]

I got pretty good accuracy with a mild load of 59.0 gr of RE-17 behind a 130 gr AccuBond. My son used it to good effect on a nice 3 point mule deer this past season. It was mild, chronographing right around 3000 fps, IIRC. Decent accuracy. I would probably try something slower if I wanted more velocity, particularly with a 140 or 150 gr bullet. Reloder 22, 25 or MagPro would be the first I would try. If you want accuracy, you might give the Reloder 17 a go, I just think the slower burners might also provide similar accuracy with a 100 to 150 fps gain in velocity at max loads.

 

[wnc-coyote]

If you have any magpro available it is most definitely worth trying. I have had my best velocity and accuracy in my 270wsm with magpro. May not be the case in all rifles but out several rifles I have used it in the closer to max you run it the better it gets.


Sent from my iPhone using Tapatalk

 

[wildgene]

Dr. this gun has never shot well with factory ammo, AB's or Barnes, my next step after the hand loaded AB's will be trying 140 partitions so I will keep the H1000 in mind, will that also work for a 180 in my other sons 300wsm? thank you

...since you have RL-17, I'd start w/ that, working up to 66grs. (near max.) w/ the 180's. I've gotten very good accuracy & MV's w/ a number of different 180gr. bullets, no problems w/ "temp. sensitivity", & personally, I think the RL-17's fast peak/ burn profile produces less "felt recoil" than comparable loads w/ slower powders...

 

[Mountain Goat]

Magpro and RL22 are your friends when it comes to the 270WSM and 140gr Accubonds. There are so many powders that will work well, but these two have been the outstanding performers for me in several 270WSM rifles. RL17, RL19 and AA4831 are my preverence with 130gr bullets.