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.300 win mag loads
Discussion regarding the reloading of ammunition and tuning of loads for accuracy
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tackdriver
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Posts: 7

PostPosted: Mon Sep 01, 2008 7:10 pm    Post subject: .300 win mag loads Reply with quote

Loaded 72 grains of IMR 4831 With 168 grain Nosler in new Rem brass for a kimber rifle, the friend I loaded them for didn't know the barrel twist, but it was not an accurate load that we were looking for. We had two inch groups at 100 yards and fist size at 200, and we are looking for a better load. Most manuals recomend RL 19 and RL 22 for this gun, I went with IMR 4831 due to previous luck. If anyone out there could get me out of a bind would appreciate it. If anything can someone give me their loads that they have had luck with. Also to add to the detail I used new remington brass.
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Pitt55
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Joined: Aug 30, 2006
Posts: 103
Location: Prince George, B.C.

PostPosted: Mon Sep 01, 2008 10:45 pm    Post subject: Re: .300 win mag loads Reply with quote

I just worked up a load for my son's 300 win. Three shots at 100yds covered with a penny. Give it a try. 74.0gr. of reloder22;win. brass;cci 250 primer;180gr. nosler ballistic tip; length will have to fit your rifle. I haven't check the speed yet but should around 2900. The recoil was very tolerable. Don

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Grant
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Location: Grande Prairie, Alberta

PostPosted: Tue Sep 02, 2008 6:33 pm    Post subject: Re: .300 win mag loads Reply with quote

Well, since every gun has it's own "sweet spot"....When I'm looking for a load, I tend to load up a few different loads, maybe 3 of each. Ok, you started with 72 grains of IMR4831...load up and down from that point changing the powder charge by .5 grain each time. Try a three shot group and see what load prints best. If you still cant get a good group, then you have to look at changing bullet weight or powder.

With my 7mm Rem mag......I started at 63 grains of IMR4831 and 175 grain Grand Slams. Loaded three round sets up to 65 grains in .5 grain steps. After the gun gave me a 3 shot group at 100 yards I could cover with a nickel with 63.5 grains..I stopped right there and the load was set.
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MagnumManiac
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PostPosted: Thu Sep 04, 2008 4:53 am    Post subject: Re: .300 win mag loads Reply with quote

I would try using RL22 and if that doesn't perform adequately, I would go for RL25. I use Federal 215 match primers for all loads in the 300WM.
I also use Remington brass for general hunting, which I debur the flash holes in, but I use Nosler custom brass for accuracy work.

I have never used 165gr bullets in either of my rifles, which are a Kimber 8400 Classic Select Grade and a Remington SenderoII.
I only use Nosler Accubonds/Ballistic Tips in 180gr and 200gr in my rifles.
Good luck, as you know, you will need to test quite a few loads before you get one that will perform to expectation.
Cheers.
MagnumManiac.
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froeal_1132
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Joined: Aug 13, 2008
Posts: 14
Location: Utah

PostPosted: Thu Sep 04, 2008 12:27 pm    Post subject: Re: .300 win mag loads Reply with quote

I recently loaded 71 gr of IMR4350 with 150 gr spbt Sierra bullet for my 300 WM. I have had good shot groups with this load and use it frequently for deer hunting.

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woods
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Joined: Oct 15, 2005
Posts: 89

PostPosted: Thu Sep 04, 2008 9:48 pm    Post subject: Re: .300 win mag loads Reply with quote

MagnumManiac wrote:
I would try using RL22 and if that doesn't perform adequately, I would go for RL25. I use Federal 215 match primers for all loads in the 300WM.
I also use Remington brass for general hunting, which I debur the flash holes in, but I use Nosler custom brass for accuracy work.

I have never used 165gr bullets in either of my rifles, which are a Kimber 8400 Classic Select Grade and a Remington SenderoII.
I only use Nosler Accubonds/Ballistic Tips in 180gr and 200gr in my rifles.
Good luck, as you know, you will need to test quite a few loads before you get one that will perform to expectation.
Cheers.
MagnumManiac.
Laughing

+2

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