Howa 300mag Accuracy

JKRamsey1991

Private
Minuteman
Oct 14, 2019
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0
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I have a Howa 1500 300 Win Mag with the 26in heavy barrel in a Boyd’s thumbhole stock that has been glass bedded. Currently equipped with a SWFA 12x SS scope. I have been unable to get the accuracy out of the rifle I expect. I have tried several bullets from 165gr to 220gr and have only occasionally been able to get a 1moa group. Checked the rifle out and it seems to have an extremely long throat. I would have to load the rounds way longer than the mag will allow.

I’m curious what bullets you would recommend that I can load that would allow me to get closer to the lands.

Also if anyone has a Howa in 300 mag can you share your accuracy and/or pet loads.
 

Steel head

Uncouth heathen
Belligerents
Aug 3, 2014
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Lots of bullet jump well now.
I wouldn’t be concerned at all about getting close to the lands.

Look how many 700’s with airline Length runways for throats shoot well.

sometimes finding an accurate load for a factory barrel with hunting bullets is easy peasy and sometimes it’s a real pain with a lot of experimentation.
 

JKRamsey1991

Private
Minuteman
Oct 14, 2019
2
0
2
Yeah that's true. So far the most consistently decent loads have been cheap blue box federal of all things. Tried some Gold Medal Match and barely kept them in a 2moa group. All my hand loads have been varied. Had one sub moa group with a load of 178gr ELDs and IMR7828 but was never able to replicate that group with subsequent loads of the same so I guess it was a fluke.
 

8up

Sergeant
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Jul 10, 2007
544
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I have one in a MDT ESS chassis. So far, I have shot A191 with really good accuracy. Tried RL-22 with so so results. I wanted to stick to Hogdon powders, since H1000 is hard to find right now, tried H4831sc using Lapua 185 scenars and 190 SMK with real good accuracy, loaded just short of max on those bullet weights. Down in the .4 to .5 MOA area, shooting suppressed.