Best powders 300 WSM and 270 WSM?

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sniper7

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Howdy members, looking for some educated opinions of powder choice for the wsm's
I use 175 and 168g barnes projectiles for the 300 WSM and use RL 17 with limited success, is there a better choice?

I use 140 g projectiles usually 140 nosler accubonds for the 270 WSM with RL17, with pretty good accuarcy but is there a better choice?
 
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there's some powders that overlap both cartridges

Code: 
Cartridge          : [B].270 WSM[/B]
Bullet             : .277, [B]140, Nosler AccuBond[/B] 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

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 62000 psi, or 427 MPa
or a maximum loading ratio or filling of 104 %
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 !

136 loads produced a Loading Ratio below user-defined minimum of 80%. 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
---------------------------------  -----------------------------------------------------------------
Alliant Reloder-26                  92.8     65.7     4.26    3236   100.0    62000   13471   1.111  ! Near Maximum !
Alliant Reloder-25                 102.0     66.8     4.33    3232   100.0    62000   13211   1.097  ! Near Maximum !
IMR 7828                           100.6     64.4     4.17    3205    98.4    62000   13674   1.094  ! Near Maximum !
IMR 7828 SSC                        95.2     64.4     4.17    3205    98.4    62000   13674   1.094  ! Near Maximum !
Vihtavuori N560                     96.0     64.6     4.18    3204    97.9    62000   14048   1.106  ! Near Maximum !
Accurate MAGPRO                     96.2     67.4     4.37    3190    96.6    62000   14130   1.111  ! Near Maximum !
Alliant Reloder-22                  96.2     64.0     4.15    3180    99.2    62000   13516   1.112  ! Near Maximum !
Ramshot Magnum                      96.4     69.2     4.48    3174    99.6    62000   13021   1.103  ! Near Maximum !
Alliant Reloder-33                 104.0     74.3     4.81    3156    93.6    56372   14825   1.150  ! Near Maximum !
Alliant Reloder-17                  84.2     58.2     3.77    3153   100.0    62000   12011   1.115  ! Near Maximum !
Alliant Reloder-23                  98.1     63.2     4.10    3151   100.0    62000   12137   1.119  ! Near Maximum !
Hodgdon H1000                      104.0     67.7     4.39    3148    98.2    59348   13264   1.107  ! Near Maximum !
Alliant Reloder-19                  93.6     61.6     3.99    3141    99.2    62000   12922   1.112  ! Near Maximum !
Ramshot Hunter                      89.2     60.6     3.93    3133   100.0    62000   12458   1.118  ! Near Maximum !
Hodgdon H414                        84.3     58.7     3.80    3130    99.8    62000   12524   1.119  ! Near Maximum !
Winchester 760                      84.3     58.7     3.80    3130    99.8    62000   12524   1.119  ! Near Maximum !
Alliant Reloder-16                  90.1     57.8     3.75    3129   100.0    62000   11877   1.122  ! Near Maximum !
Hodgdon Retumbo                    104.0     68.9     4.46    3125    99.7    53892   13690   1.146
Hodgdon H4831                       98.8     63.2     4.10    3116    97.7    62000   12789   1.111  ! Near Maximum !
Hodgdon H4831 SC                    95.0     63.2     4.10    3116    97.7    62000   12789   1.111  ! Near Maximum !
IMR 4831                            92.9     58.6     3.80    3088   100.0    62000   11636   1.132  ! Near Maximum !
IMR 4955 Enduron                    96.6     61.9     4.01    3086    97.9    62000   12438   1.116  ! Near Maximum !
Hodgdon H4350                       91.7     59.1     3.83    3082    99.6    62000   11967   1.120  ! Near Maximum !
IMR 4350                            90.0     58.9     3.82    3081    99.7    62000   11942   1.121  ! Near Maximum !

Code: 
Cartridge          : .[B]300 WSM[/B] (CIP)
Bullet             : .308, [B]175, Barnes 'LRX'BT[/B] 30318
Useable Case Capaci: 68.271 grain H2O = 4.433 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: 62000 psi, or 427 MPa
or a maximum loading ratio or filling of 104 %
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 !

105 loads produced a Loading Ratio below user-defined minimum of 80%. 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
---------------------------------  -----------------------------------------------------------------
Alliant Reloder-26                 101.1     68.4     4.43    3063   100.0    62000   11050   1.107  ! Near Maximum !
Vihtavuori N560                    103.7     66.7     4.32    3003    96.3    62000   11242   1.113  ! Near Maximum !
IMR 7828 SSC                       102.4     66.2     4.29    2988    96.7    62000   10877   1.107  ! Near Maximum !
Accurate MAGPRO                    104.0     69.6     4.51    2986    94.7    62000   11239   1.141  ! Near Maximum !
Alliant Reloder-22                 103.9     66.1     4.28    2985    98.1    62000   10887   1.119  ! Near Maximum !
Alliant Reloder-17                  91.3     60.3     3.91    2980   100.0    62000    9807   1.121  ! Near Maximum !
Ramshot Magnum                     103.8     71.1     4.61    2965    98.5    62000   10433   1.134  ! Near Maximum !
Alliant Reloder-16                  97.3     59.7     3.87    2945   100.0    62000    9671   1.133  ! Near Maximum !
Alliant Reloder-19                 100.5     63.3     4.10    2936    97.9    62000   10358   1.127  ! Near Maximum !
Ramshot Hunter                      95.9     62.3     4.04    2935    99.6    62000   10095   1.133  ! Near Maximum !
Winchester 760                      90.5     60.3     3.90    2927    99.1    62000   10096   1.135  ! Near Maximum !
Hodgdon H414                        90.5     60.3     3.90    2927    99.1    62000   10096   1.135  ! Near Maximum !
Alliant Reloder-23                 104.0     64.0     4.15    2918   100.0    57952    9809   1.150  ! Near Maximum !
Hodgdon H4831 SC                   101.8     64.8     4.20    2905    95.8    62000   10141   1.126  ! Near Maximum !
IMR 4831                            99.9     60.2     3.90    2896   100.0    62000    9459   1.147  ! Near Maximum !
IMR 4895                            86.1     54.2     3.51    2889   100.0    62000    9233   1.151  ! Near Maximum !
Hodgdon Hybrid 100V                 97.8     59.6     3.86    2881   100.0    62000    8885   1.142  ! Near Maximum !
Hodgdon H4350                       98.0     60.3     3.91    2872    98.6    62000    9572   1.142  ! Near Maximum !
 
The list above gets you 6-12 choices. Then it's trial and error looking for what the rifles like. Then there's no availability and horrible pricing right now.

Only thing I see with the list above is r22 and r25. Those are powders I typically use in larger overbore magnums....Weatherby.....Rums. perhaps with the largest for caliber projectiles, but probably too slow for maximum performance in your.WSM. Unless you have a.lifetime supply you need to use.
 
I use RL17 7 or RL22 with good results. I tried H4350 & IMR4831 but got pressure signs way sooner than I wanted. Had better luck with IMR4831 than H4350 but not by much. If I could get it I would try RL26 but finding it is near impossible.
 
I have a tikka .300 wsm have had very good success with imr 4451 62.3g and 190 ablr’s. 4451 is intended for wsm. Hybrid100 was also very good in my rifle with the 190’s
 
I used H4350 for the 300 wsm and have switched away from it. Having access to quick load has shown me that Ramshot Hunter and RL 16 is better suited for the short mags I load for. I loaded and hunted with the 168 ttsx, 165 ttsx and the 175 lrx. Both are temperature stable.
 
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My pet load is 48.0 g RL15 + Fed 215 primers + Hornady Brass + 168 TTSXs. While the velocity is nothing to write home about (ave. 2940 FPS), it averages .96", 4-shot groups and I've harvested three moose with this load - all were pass-throughs and edible meat to the bullet hole

I've have tried to following powders with the 168 TTSXs in my Sako M85 300 WSM:
- Reloader 17
- H4350
- VV550
- VV560

After RL 15, H4350 was the best performer (accuracy load averages ~1.5"").

I've recently tried 165 Feb TBTs and got two .6" inch groups - unfortunately this load average 2195 fps - while I did not see any overpressure signs, the published max velocity is 2121 fps if I remember coorrecty (i.e., almost certainly over-pressure). Once component availability picks up, I want to give this bullet a try (a like the speeds listed for this bullet with Ramshot Hunter.
 
vanisland diver said:
I have a tikka .300 wsm have had very good success with imr 4451 62.3g and 190 ablr’s. 4451 is intended for wsm. Hybrid100 was also very good in my rifle with the 190’s
Click to expand...
I tried Hybrid 100 at Noslers recommendation but at the same time I wad a blown Winchester primer issue that's toppled testing. I didn't' realize the primer issue was an issue in itself. I will have to go back and try with CCI' s one of these days
 
140 gr accubonds h4831 sc under 1/2" at 100 3100fps

wanted more speed so went with Magpro grouped just over 1/2" HAIR FROM 3300 FPS
 
Mine is IMR 4350..64.6 grains(on the high side)...WRLM primers...Win Nickle brass ((( these loads were tested for my Browning A-Bolt II S/S ...pressure signs were mimimal ...you're rifle will undoubtedly vary) adjust loads accordingly.

3 moose/2 blackies/ deer, deer and more deer ;)
 
I have had best success with RL22 so far.
69 grains behind 180 grain swift A frames produced best, then 69 grains behind 180 grain nosler BT. 224A1DCB-3414-44EF-8F95-31BE44AC6B7B.jpg75336C37-D1D2-43B7-9328-E3937DFBE6F3.jpg
 

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