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Accuracy with 300 Win Mag.

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Unread 09-16-2008, 09:42 AM
Silver Member
Join Date: Apr 2007
Location: Georgia
Posts: 458
Re: Accuracy with 300 Win Mag.

Originally Posted by mgd45 View Post
We were mainly starting to wonder if the rifle just didn't like the 180 gr. bullets and maybe we should try heavier ones like 200 & above....

My 300 winchester mag dosen't like 180's but it will shoot 165/168 with a 210match H4831sc perfect and then it will shoot a 200ab and a 210 berger with a F215Mag and H1000 perfect. it is strange but it's what my rifle likes.
“If you keep doing what you’re doing, you’ll keep getting what you’re getting.”
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Unread 09-16-2008, 11:36 AM
Silver Member
Join Date: Jan 2008
Location: Kalispell, Mt
Posts: 187
Re: Accuracy with 300 Win Mag.

Also try 180 sierra gamekings with CCI 250 primers and reloader 22 my dads gun shoots that load very well i cant remember how much powder for sure but i think its 75 grs.
Lefty's are the normal ones in the shootin world!!
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Unread 09-16-2008, 02:30 PM
ATH ATH is offline
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Join Date: Oct 2003
Location: Lizton, IN
Posts: 820
Re: Accuracy with 300 Win Mag.

200 SMK and 200 Accubonds, 74.0gr Re22 and 73.2gr respectively. CCI magnum primers. Both loads .5 MOA for the majority of groups. Factory Sendero rifle.
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Unread 09-16-2008, 09:43 PM
Silver Member
Join Date: Nov 2007
Location: nw indiana
Posts: 172
Re: Accuracy with 300 Win Mag.

73 grns H4831
fed 215 primer
Nosler BT or Partitions 180 gn
Lapua brass

Stock rifle with HS stock gets about 3/4 inch at 200 yards. I gotta find a longer place to shoot

Good luck, Grin
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Unread 09-23-2008, 02:28 PM
Bronze Member
Join Date: Jul 2008
Posts: 32
Re: Accuracy with 300 Win Mag.

My buddy has a Tikka T3 300 Win Mag with the 24" barrel

I've loaded up quite a few loads for him. Probably 300 or so. There is quite a bit of freebore in this rifle. Around .100"-.200" depending on bullet(seating at mag length which is 3.365").

We have found that the 180 Hornady SSTs with H4350 shoot the best. Very comparable with H100V. I don't have the info, but I believe I was using 69 gr H4350 with 215M primers @ 3050 fps. Pretty consistent 1/2"-3/4" groups at 100. It also likes 68 gr of H100V at the same velocity. 72 gr of AA4350 provided about 3100 fps but accuracy was about 1". Tried IMR 4831 which gave 3100 fps but about 1.5 MOA.

His gun really likes 180 SSTs and Interlock BTSP. Tried Sierras, Barnes MRX, and Swift Scirroccos. For some reason it refuses to shoot the Swifts with every powder we have tried, over 2". This includes IMR 7828, RL22, AA4350, H100V, H4350, and IMR 4831.
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