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300wsm primers

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Old 08-01-2012, 09:44 PM
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Join Date: Oct 2011
Posts: 127
300wsm primers

Ok so I have been working on a load for my custom model 70 chambered in 300wsm. I worked up loads with Berger 190s and 208 amax. The amaxes grouped way better and now my question is what is everyone using. For primers. I have 210m and 215m by the thousands so what would be my best bet. Thanks in advance.
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Old 08-01-2012, 10:06 PM
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Join Date: Dec 2008
Posts: 183
Re: 300wsm primers

I just ran a primer test with my 300WSM. The gun is a Win M70 Extreme weather, 24" barrel. Powder is H4350 at 63.9 grs. The best for me was the Winchester Magnum primer. Ii did not shoot over a chrono. I will attach my target results. Keep the thread posted if you do any testing as well. I am in a constant search for improvements to my 300WSM.
Attached Files
File Type: pdf OCW 168gr Barnes & H4350 primer trial.pdf (783.9 KB, 0 views)
"Skin that one, pilgrim, and I'll get you another!"
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Old 08-01-2012, 10:18 PM
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Join Date: Oct 2011
Posts: 127
Re: 300wsm primers

I'm loading with h4350 also but I'm at 62.5 with the 208s. I will keep it going for sure and I will load up some of each primer and bring my chrono out.
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Old 08-02-2012, 11:23 AM
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Join Date: Feb 2008
Location: Memphis Tn
Posts: 332
Re: 300wsm primers

I have loaded the 300WSM for a number of years and have most of the time used WLRM primers with most powders, when I started using RL-17 I followed the loading data and used Federal 215 primers. Both worked well but I have not make a direct comparison of velocities.
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