230gn Sierra Matchking & 300 win mag

Rebelirons

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Feb 16, 2017
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Anyone out use these bullets in their 300 mag yet? I bought 100 to try out but haven't gotten around to loading any yet. I did notice they're long as hell, about 10 thou. longer than the 230 Hybrids. I also noticed they look like they've been tipped at the factory. They recommend 1:8-9 twist but I'm gonna give em a shot in my 1:10. 230 Hybrids are $ in my mag so we'll see. If anyone has tried these please let me know what you thought. Thanks
 
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BurnOut

DDOJSIOC
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Nov 24, 2013
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Definitely keep us in the loop... I have been running the 230 gr Bergers and been really impressed, but like you, I have a 10-twist barrel, so I'm curious to see how the Sierras perform.
 

Bigwheels

Gunny Sergeant
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Ditto. I just rebarreled to a 1:9.5" tw for the 230gr Berger & now trying out the 225 Hornady. Will be interested in this bullet as well.
 

gamewarden

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Mar 19, 2012
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Anybody have any reports on these in a 300 WM yet? Especially compared to 230 Hybrids...
 

Rebelirons

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I did try them in my 28" 1:10 twist .300 wm. My rifle will shoot the 230 Hybrids just fine. Accuracy and speed is really good. I was worried at first about that bullet and the twist rate but I've had no issues. However when I tried the 230 SMK, they were all over the place. Accuracy was shit! Like 4" at 100 and worse at 300. I tried a bunch of different loads and seating depths but I just couldn't get them to shoot. The twist has to equate to the problem. That's all I could come up with. I'm have a 1:9" twist barrel spun up for my mag and when that's done I might try em again. I'm sure someone could get em to work, it just wasn't me. They are long, about .210" longer than the 230 Hybrid. I can get numbers later today, cause I'm at work now, and try to post them up
 
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Saracen

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Oct 28, 2017
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Anyone out use these bullets in their 300 mag yet? I bought 100 to try out but haven't gotten around to loading any yet. I did notice they're long as hell, about 10 thou. longer than the 230 Hybrids. I also noticed they look like they've been tipped at the factory. They recommend 1:8-9 twist but I'm gonna give em a shot in my 1:10. 230 Hybrids are $ in my mag so we'll see. If anyone has tried these please let me know what you thought. Thanks
I have. Early days yet, as I'm working up a load, but they seem pretty much a one hole job 👌.
That's through my Remington Sendero with a Lothar Walther 1 in 8 twist and RWS brass.
 

Rebelirons

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I ended up trying these out of my 1:10 300wm. No matter what powder, seating depth or brass I used they didn’t do well at all. The smallest group I got was about 1 and a half inch at 100 yards. They got worse at 200 and 300 yards. I just got a new 1:9 barrel put on my 300 so I might try em again later on or I’ll try em in my 300 Norma, when it’s done