Hunting Washington Forum
Equipment & Gear => Guns and Ammo => Topic started by: Badhabit on March 28, 2018, 05:55:02 PM
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My 7mm Weatherby has a 1:10 barrel twist as compared to the 7mm Rem Mag that has a 1:9.25 barrel twist. My question is what's the heaviest grain bullet I can shoot accurately with the 1:10 twist. My research is showing me that a 160 grn bullet is more stable than than the 175 grn. Apparently something happens do to the twist to destablize the bullet beyond 168 grns. My reloads for my 7mm Weatherby before it was stolen was 175 grn nosler partion with 80 grns of H870. Now that I've replaced the stolen 7mm I have to start all over as H870 is no longer manufactured. I'm thinking of having Nosler reload a box or two of their 160 grn accubonds. While they are on sale at $73.00 a box. My goal is to have one hunting load to do everything. Stay with the 175's? The ballistic coefficients for the .284 bullets are really pretty good. I think the 160 grn are better thann the 175.
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With prices like that I'd start reloading
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JBM CALCULATIONS-STABILITY. This is a on line calculator i use to figure the weight to twist often. :tup:
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Oh Mah, thank you for the site. I'll have to take a day or two or three to figure out how to input good information to get good information. Lots of terms I've never heard of before.
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:tup:
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Oh MaH, your inbox is full.
When I get a stability factor for a bullet is 1.259 vs 1.188 is the higher the number the more stabile?
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Yes. Anything over 1.2 is go to go
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yes if you dig through that site you will see a go no go chart.but yes like jasnt said. :tup:
