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300 ultra mag load data

 
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  #8  
Old 05-17-2008, 08:56 PM
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Join Date: Nov 2003
Location: Washington State
Posts: 2,430
Yeah guys,

Install the Wyatts box. 4" OAL and controlled centerfeed. Much better than the stock unit in terms of allowed OAL and the controlled cenerfeed is much more reliable. But only 2 down instead of 3--who needs those anyway? Have to play with the wings a bit. I've found for my RUM, the 240 SMK likes being right on the lands as well. Have fun tinkering...
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  #9  
Old 05-17-2008, 09:22 PM
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Quote:
Originally Posted by stxhunter View Post
i'm haveing a wyatts mag installed in my 300 rum right now you might try the 200 ab behind 95 gr retumbo its really accurate in my rifle and is the go to load for alot of rum shooters on this forum will get between 3100 and 3200 fts

95 grains of Retumbo behind the 200 AccuBond is an excellent load..
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  #10  
Old 05-18-2008, 01:42 PM
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Talked to the gun smith he is going to get me a mag box extender.
thanks for all your help

I'll let you no how it all turns out

Thanks again guys
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  #11  
Old 05-22-2008, 08:17 AM
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Join Date: Apr 2008
Location: Bruce Mines, On,
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stxhunter, ive herd thats a good load and im hoping to try it soon, but do you know if retumbo is temp sensitive ??
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  #12  
Old 05-22-2008, 06:55 PM
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i chrono my loads in august it was around 95 dg and they where running 3160 fps av. i haven't chrono them in the cooler months yet but have not notice a change in impact shooting in the winter. but heck it can be 80 dg here in south tx in dec or jan we might only get aweek or so of really cold weather below 40 all winter. but from what i've read on this site is that it is pretty stable
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  #13  
Old 05-25-2008, 09:35 AM
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Join Date: Apr 2008
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just wondering about that cause where i shoot it can be around 0 or colder and i wanted to know if the powder was going to be relieable or not
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  #14  
Old 12-12-2012, 08:41 PM
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Join Date: Feb 2012
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Re: 300 ultra mag load data

Your best money spent is on a wyatts extended box. Get the 4inch box the 3.850 will work but as you shoot your gun the throat will continue to grow beyond 3.850 and you will be chasing accuracy again. I had it done to my 300 ultra, groups went below one inch. I then had it glass beaded and it will shoot half inch groups all day.
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