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300 winmag help

 
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  #1  
Old 04-01-2004, 02:25 PM
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Join Date: Mar 2004
Location: interior BC
Posts: 4
300 winmag help

New member here.I am load developing for my new Tikka T3 hunter.So far I have 120 bullets through the rifle.80 winchester 150grPP for break in and brass collection.I have 40 handloads through it too.Hornady 180gr BTSP with IMR 4831 from 69gr to 72.6gr, win brass and fed 215 primers.The barrel is 1 in 11 twist.The accuracy with the 150gr factory loads were good to great,a couple of 5 shot groups at 1".Two bullets touching in a group was normal.Accuracy with the 180gr has been sporadic at best.I have one four shot group at 71.5 gr that measueres 1.4",and one four shot group at 72.6gr that measures 1.2".I am not the most seasoned loader but I do take my time measure each powder load,neck size my brass, do all I can for accurate consistent loads.I just read in an old post here that the barrel twist suggests lighter bullets.I was trying the 180gr for more stability in the wind at long ranges.I hunt muleys in open country{ why I bought a 300winmag}.I will be trying the hornady 165grBTSP next and if I try more bullets I will be useing either the Nosler BT, Sierra MK or Amax.You guys sure have amazing accurate and lethal results from the Baltips,SMK,and Amax bullets.I have IMR 4831,4350.Fed 210m,215and WinLR primers here.I also have new and fireformed brass all winchester.Any load formulas to try or accuracy tips would be appreciated.I hope to make my new iron a honest 800 yd rifle.

[ 04-01-2004: Message edited by: Canadian Buck ]
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  #2  
Old 04-01-2004, 07:20 PM
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Join Date: Dec 2001
Location: occupied, USA
Posts: 189
Re: 300 winmag help

72 grains of H4831, in Winchester brass, with 200 grain Sierra Match King, and magnum primer.

Capable of 1/2 MOA accuracy in a good rifle.
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  #3  
Old 04-01-2004, 11:22 PM
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Join Date: Dec 2003
Location: Sask.
Posts: 7
Re: 300 winmag help

Have had good luck with Hornady 180 SPBT in my T-3. Only difference is I'm using Win. primers, Win. brass and RL-22. Have found you have to pace yourself as barrel heats up fairly easy. Keep us updated.
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  #4  
Old 04-02-2004, 12:28 AM
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Join Date: Mar 2004
Location: interior BC
Posts: 4
Re: 300 winmag help

I shoot 2 then wait 5 mins then shoot 2 more for the group.Win large rifle or large rifle mag primers?

[ 04-02-2004: Message edited by: Canadian Buck ]
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  #5  
Old 04-02-2004, 01:25 AM
Junior Member
 
Join Date: Dec 2003
Location: Sask.
Posts: 7
Re: 300 winmag help

Just Large Rifle Primers, haven't needed Mag primers yet, and it does get a bit chilly here in Sask. during hunting season. Of your two powders try 4350 and one of your 165 grain bullets, IMR-4350 and 165 Nosler ballistic tips used to shoot one ragged hole out of my old 300, haven't tried that in this one yet but a lot of people have had good luck with this combo. If you use this combo for mulies let them get a little farther away [img]images/icons/wink.gif[/img]
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  #6  
Old 04-02-2004, 09:09 AM
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Join Date: Jan 2004
Location: Boise
Posts: 15
Re: 300 winmag help

For hunting accuracy try the 165gr Nosler Ballistic tips with 79gr H-4831, 3430fps.(not great for shorter ranges at high velocity).
For more controlled expansion try the Barnes 168gr triple shocks with I-4831 can't remember the grains of powder on that one don't have my book here, at 3390fps, these will expand out to 1700 or 1800 fps. (make sure you seat them well off the lands).
I get 1 hole groups with both of these in my .300 win mag. (26" barrel)and very consistent velocity readings on my chronograph.
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  #7  
Old 04-02-2004, 09:49 AM
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Join Date: Mar 2003
Location: PA
Posts: 194
Re: 300 winmag help

I shoot a 300 win mag model 70 with a 26 inch barrel. My magic load is 75 grains of RL-22, 180 grain SST seated touching the lands. I also use Norma brass with a FED 215 match primer.
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