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BOSS Settings for .300 Weatherby?

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Unread 01-10-2011, 07:12 PM
Gold Member
Join Date: Nov 2009
Posts: 805
BOSS Settings for .300 Weatherby?


I've got a Win Model 70 classic stainless in .300 Weatherby mag. with the BOSS that we've never shot. Time to to see how it shoots. I'm looking for the suggested BOSS settings for various Weatherby factory loads with 130 to 200 grain bullets. Anyone know where to find that data? With what they cost I hate to waste more Weatherby shells than are necessary to get this gun shooting.


Looking for quality 20-60x80mm spotting scope, 15x56 binoculars & quality rifle scopes (Swarovski, Nightforce, Zeiss, etc.).
Looking for accurate stainless rifles in: .243 Win, .338 magnum (Edge?), & .340 magnums, and a .410 shotgun.

For sale: Tikka T3 in .270WSM with a Bushnell Elite 3200 3-9x50, Rem 700 XCR in .270WSM with a Nikon Monarch 2.5-10x44. Mounted scopes on both but neither has hunted yet & both look NEW. Also, a Win 70 SS with BOSS in .300 Weatherby mag..

Let's deal!
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Unread 01-10-2011, 10:36 PM
Junior Member
Join Date: Jan 2011
Location: Tacoma, WA
Posts: 17
Re: BOSS Settings for .300 Weatherby?

Not too sure why but even on the Browning site the chart doesn't have a 300 Wby. here is where to find the chart, maybe just start with somehting close and see where it goes.

I have a Browning rifle with the BOSS. What is the "Sweet Spot" setting for my firearm?
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Unread 01-11-2011, 08:35 AM
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Join Date: Nov 2009
Posts: 805
Re: BOSS Settings for .300 Weatherby?

Yes, the Winchester Model 70 Classic was offered in more chamberings than the Browning counterparts. Finding the recommended settings would likely save me a few boxes of ammunition, and with the price of Weatherby ammunition I figure it's worth doing the research. Both Browning & Winchester have posted suggested BOSS settings on their websites but neither lists the .300 Weatherby chambering.

Last edited by Buano; 01-11-2011 at 10:43 AM.
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Unread 01-13-2011, 12:24 AM
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Join Date: Nov 2009
Posts: 805
Re: BOSS Settings for .300 Weatherby?

Found them:

Weatherby .300 Wby. Factory Cartridges
Wt. Bullet Type Suggested B/C BOSS
Grns. Usage Setting

130 Barnes TTSX M 0.35
150 SP M 0.338 3.0
150 Partition M 0.387 3.0
165 SP M 0.387 3.7
165 Barnes TSX MB 0.38 3.7
165 BST M 0.475 3.7
180 Spitzer MB 0.331 7.4
180 SP MB 0.425 7.4
180 Barnes TSX MB 0.453 7.4
180 BST MB 0.507 7.4
180 Accubond MB 0.507 7.4
180 Partition MB 0.474 7.4
190 8.9
200 Partition MB 0.481
220 Rn-Ex B 0.3
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