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best powder for 270WSM 130-140gr

 
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  #8  
Old 07-21-2010, 09:32 PM
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Re: best powder for 270WSM 130-140gr

63.5grns of RL19 for 130grn Accubond lit with a Fed215GM is my PET load "BUGHOLES"!
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  #9  
Old 07-21-2010, 11:16 PM
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Re: best powder for 270WSM 130-140gr

Thanks for all the good information.

I checked my loading room, and I do have nearly a full pound of RL 19 as well, I forgot I tried it in a 25-06 and 280 once.

Will the RL 17 or 19 stay stable in the varied temperature, I have had major POI changes with RL 22 in a 300win?

Where can I find the information on the change in powders depending upon temp & velocity? I know my varmint rifles zeroed perfectly here shoot quite a bit high when I go to the mountains for rockchucks.
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  #10  
Old 07-21-2010, 11:30 PM
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Re: best powder for 270WSM 130-140gr

I've been working up loads for my 270WSM the last couple of weeks with the Hodgdon Extreme powders for the same reasons you mentioned.
69grns of H1000 yielded 3065fps and .69in groups @ 100yds.
61.5grns of H4831SC yielded 2930fps and .86in groups @ 100yds.
The rifle has a 23in barrel and is capable of better groups.
Next up is H4350 and if that doesn't work its onto Magpro.
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  #11  
Old 07-21-2010, 11:33 PM
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Re: best powder for 270WSM 130-140gr

Quote:
Originally Posted by Popapi View Post
63.5grns of RL19 for 130grn Accubond lit with a Fed215GM is my PET load "BUGHOLES"!
Popapi was the one who turned me on to RL-19 for my 270wsm. Thanks again Popapi.
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  #12  
Old 07-21-2010, 11:35 PM
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Re: best powder for 270WSM 130-140gr

Try RL17 and with a WSM go up to the 150grain bullets. They have a better BC and more thump on the business end.
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  #13  
Old 07-22-2010, 07:59 AM
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Re: best powder for 270WSM 130-140gr

Quote:
Originally Posted by mcseal2 View Post
Thanks for all the good information.

I checked my loading room, and I do have nearly a full pound of RL 19 as well, I forgot I tried it in a 25-06 and 280 once.

Will the RL 17 or 19 stay stable in the varied temperature, I have had major POI changes with RL 22 in a 300win?

Where can I find the information on the change in powders depending upon temp & velocity? I know my varmint rifles zeroed perfectly here shoot quite a bit high when I go to the mountains for rockchucks.
I've seen some temp issues with R17 in my varmint loads but I usually stay with the Retumbo, H1000 or H4350, all have shoot great groups but only the slow stuff will yield the velocity I'm wanting. Magpro is the velocity king in the 270 WSM as far as I'm concerned, I maxed out at 3420FPS with 140 gr bullets but could not get the accuracy and SD I was looking for so I just stay with Retumbo, extremely low SD with max speed and accuracy I go from shooting in -20 to 90 degrees with this load and see no changes!
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  #14  
Old 07-22-2010, 09:51 AM
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Re: best powder for 270WSM 130-140gr

Quote:
Originally Posted by winmag View Post
Popapi was the one who turned me on to RL-19 for my 270wsm. Thanks again Popapi.
No problem Win I'm glad everything worked out for you Guy!!!!!!!! Have a good one !!!!!
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