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Best 7MM WSM loads?

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Unread 11-14-2008, 02:49 PM
Silver Member
Join Date: Mar 2008
Location: Washington, TX
Posts: 280
Re: Best 7MM WSM loads?

Well everyone,

here is the pics of Erics 7WSM. He runs 180 JLK's through it.

3 shot group at 875 yards

Doe taken at 408 yards

Erics rifle is easily a sub 1/2 MOA rifle out to 1000 yards
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Unread 11-14-2008, 11:45 PM
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Join Date: Feb 2008
Location: Sacramento, CA
Posts: 1,010
Re: Best 7MM WSM loads?

Model 70 rebuilt with pacnor 26 supermatch SS barrel, classic laminated stock inletted & glass bedded with decelerator pad and timney at 2 3/4Lbs.

Break in was as specified by Pacnor. shoot1/cleanx10, then shoot3/cleanx10, now I'm up to shoot5/clean while working up a load. Cleaning has been strictly with mops & patches. This barrel may never see a brush, nor need one.

I'm planning to test the 140 & 160 gr Accubonds as well as 150 ballistic & e-tips. I'm able to reach the rifling with these bullets in short action magazine. I think Pac-nor reamed it with a short leade. Those guys are great.

I'm not so sure about the 168gr bergers & A-max. Can I even seat them to fit the mag, without seating past the bullet shank? Maybe someone with a winchester wsm action has tried this already?

I'm planning to restrict powders to H1000, H4831 SC, and H4350, unless they absolutely won't work, then I'll try magpro, RL19, and/or RL22.

Initial test loads for this weekend are 140's touching lands, with H4831sc, working up to Nosler's max. We'll see...
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Unread 11-17-2008, 11:10 AM
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Join Date: Oct 2005
Location: NM
Posts: 180
Re: Best 7MM WSM loads?

If your throat and lead are short enough, they will fit.

There isn't a lot of bullet shank outside of the case.

I shoot a 180 Berger in a WSM action, and there's enough mag length to jam them in the rifling about .020".
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Unread 11-17-2008, 12:53 PM
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Join Date: Nov 2005
Location: Texas
Posts: 1,845
Re: Best 7MM WSM loads?

This is good info---my 6.5 WSM is going to be finished this week and this give me some ideas!!
The Truth Is Not Always Good For Business!!
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Unread 11-18-2008, 10:07 AM
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Join Date: Mar 2008
Location: Washington, TX
Posts: 280
Re: Best 7MM WSM loads?


Why not try a 140 gr Berger? Get a better BC and terminal ballistics. That is a very explosive bullet. All energy will get transfered into the animal and not the hill behind it;)

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Unread 02-15-2011, 04:42 PM
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Join Date: Dec 2008
Posts: 77
Re: Best 7MM WSM loads?

McWhorter 7 WSM custom with a 24 inch hart #5 light contour.

180 berger vlds, 69.0 grns of Hodgdon Retumbo, Winchester Brass, Federal 215 primers, most accurate seating depth is .010 & .051 off the lans. I started seeing pressure signs @ 70 grains of powder so I backed it down to 69.0 grains which is still a compressed load but very accurate. Average MV is 2971.
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Unread 12-31-2011, 08:16 AM
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Join Date: Feb 2010
Posts: 182
Re: Best 7MM WSM loads?

Is there a better powder for a 24 inch barrel shooting 180 bergers as opposed to longer barrels? What powder is best for a 24 inch barrel?
As I walk through the valley of the shadow of death I will fear nothing cause my rifle is with me.
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