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berger 338 250gr hybrid loads for 338 win mag

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Unread 03-06-2012, 01:39 PM
Junior Member
Join Date: Mar 2008
Posts: 28
berger 338 250gr hybrid loads for 338 win mag

I was lucky to be chosen to beta test these new bullets before they reach the marketplace. Anyone have experience with 338 win mag loading for berger hybrid bullets? Bullet 250 gr hybrid OTM is 1.6285" G7 is 0.349 and G1 is 0.682. I'm using winchester new brass and CCI 250M primers. Rifle is an accurized Mauser with 26" match McGowen barrel. Doing a ladder test and bullet seating depth tests. Powders on hand IMR 4064, IMR 4350, Reloder 17, and H4831sc. Thanks, Steve
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Unread 03-06-2012, 08:41 PM
Gold Member
Join Date: Dec 2008
Location: Boise IDAHO
Posts: 838
Re: berger 338 250gr hybrid loads for 338 win mag

I have no experience with them, but am interested. I for one would love to here the results of your testing. Wish I could help and hope someone can.
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Unread 03-06-2012, 09:30 PM
Silver Member
Join Date: Jun 2010
Posts: 182
Re: berger 338 250gr hybrid loads for 338 win mag

Sweet, really interested in how imr4350 does. I also hear rl19 is a good powder in the heavier bullets in the 338wm. Bet imr4350 and h4831 do well. Please keep us updated,looking forward to the info.
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Unread 03-07-2012, 01:54 AM
Posts: n/a
Re: berger 338 250gr hybrid loads for 338 win mag

I am testing them also in a 338 Ultra mag. I started out .050 off the lands because that is where my 225 TTSX's shot 5/8 inch at 300 yds. So far my best group is 3 shots in 1 inch at 300 yds. with 90 gr IMR 7828 and fed mag primers at 3015 fps. I talked with Michelle G. today to try and find a starting point for seating depth because these are different than the VLD's. And if I do a bunch of seating depth's I will not have enough bullets to test these out at farther distances. She said she would talk to Eric and find out where they were seating the 300 gr hybrids and get back to me. I will let you know what she said.
When I tested these on monday the wind was blowing from 6 to 10 mph and these bullets were shooting good. If I can get these to shoot better than they WILL be my go to bullet for long range hunting.
I will post my loads and results after I shoot my next test loads.
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Unread 03-07-2012, 09:31 PM
Platinum Member
Join Date: Dec 2009
Location: NW MT
Posts: 3,042
Re: berger 338 250gr hybrid loads for 338 win mag

If you got 1'' at 300 you are doing good. That is 1/3 moa and they usually hold at distance. I have got 1'' at 400 w/300 otm, but is usually closer to 2+, that is at .005 off, and those rounds are within .002-3 consentric.I also fed 215, but would like to try match primer.
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Unread 07-24-2014, 09:59 PM
Gold Member
Join Date: Jan 2008
Location: Gillette WY
Posts: 917
Re: berger 338 250gr hybrid loads for 338 win mag

any new info? just loaded some 250's up for my 338 win mag but havnt had a chance to shoot them yet. loaded with h-4350. if a guy could get these going 2700-2800fps it would make a 338 win mag one heck of a long range rig. another great fact of the win mag is it is burning a lot less powder than say lapua or RUM but is surprisingly close in speed. less powder also means shorter barrels, mine is 21". makes for a nice short hunting hammer
Remington 700 7mm SAUM Magnum Research Barrel
Savage Target Action 6.5x47 Lapua
Savage Predator Hunter Max1 6.5-284 Norma
Savage Bear Hunter 338 Win Mag
"Gotta Kill It Before You Can Grill It"
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Unread 07-25-2014, 11:20 AM
Silver Member
Join Date: Feb 2014
Location: Pa/Maine
Posts: 204
Re: berger 338 250gr hybrid loads for 338 win mag

I have not tried the 250,s yet ,but I did try the 300,s just for the fun of it.I used 60 grains of win 760 with Remingtom brass and fed 215 primers .I had them 10 ths off the lands.They were shot out of a 700 Remington with a 24 inch barrel.I hope your 250,s shoot as good as the 300,s do..They have to shoot flatter.
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