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300 Norma Mag std VS Improved - 3200fps A-max?

 
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  #8  
Old 04-06-2011, 09:20 PM
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Re: 300 Norma Mag std VS Improved - 3200fps A-max?

300magman, my sendero II had no problem making 3150 with the 208 amax or the 210 berger with a 26" barrel. and the loads were not hot. I used 96grns of retumbo.
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  #9  
Old 04-08-2011, 06:58 AM
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Re: 300 Norma Mag std VS Improved - 3200fps A-max?

300 RUM is based on a magnum boltface, while the 300 Norma Magnum is built on a 338 LM boltface, using 338 Norma Magnum brass that has been necked down to 30 cal - they now have 300 Norma Mag headstamp brass. As a result one uses a 338 LM action the other a standard magnum action (I know folks build 338 LM on a magnum action, but I'm not one of them). My memory may be failing me, but my research reflected teh 300 norma mag case capacity right at 105-108 grains of water and the 300 RUM something around 112-115 grains of water.

The 300 Norma was designed to accomodate the 300 grain sierra 338 without much impingment on the case capacity and still fit into a standard 338LM magazine. If oyu put a 300 grain 338 pill into the RUM equivelent brass and then seat them into a LM magazine, you eat up a bunch of case capacity with the bullet.

Jeffvn

Yes Jimmy loves the 300 Norma, much better than the 338 version.
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  #10  
Old 10-26-2012, 12:07 AM
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Re: 300 Norma Mag std VS Improved - 3200fps A-max?

I have had a 300 win for over 40 years a great gun but you have to bury a 200 gr lead in the charge The 300 ultra is like over charge for what it gains. All the short fat mags are just hot rod 06s This 300 norma sounds like an answer to 3000fps in a hever bullet.
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  #11  
Old 10-26-2012, 08:34 AM
TH TH is offline
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Re: 300 Norma Mag std VS Improved - 3200fps A-max?

I have a 338 norma necked down to 30 cal and improved. I shoot the 208 A max at 3275
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  #12  
Old 10-26-2012, 01:23 PM
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Re: 300 Norma Mag std VS Improved - 3200fps A-max?

I Have at least two mauser actions sitting around and I just rebuilt my 300 win so am very familair with cost but what are brase cost, where did you get dies and is this two or three peice set of dies and have you bought any of the headstamped 300 norma brass? mike
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  #13  
Old 10-26-2012, 04:08 PM
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Re: 300 Norma Mag std VS Improved - 3200fps A-max?

I am getting 3100 fps with 208's in my 300 Norma with a 28" bbl. Found an accuracy node at 3100 with single digit extreme spreads. and going higher the E/S went up considerably.
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