Will a 1 in 10 twist stabilize those in a 257 weatherby? I ordered some scirroco it's from Dallas custom reloads and had them in about 2 weeks
Our recommendations are based on sea level and 32F which also helps above sea level and lower temps seen in elk and mulie hunting.
Basically if people follow our guidelines they will have 100% of their BC and more importantly consistent dope throughout the day or seasons when they need it.
1:7 for non-magnum SA
1:7.5 for cases from 3140-3200+ fps (25-06 and SA Magnums)
1:8 for larger magnums like Gibbs, Arnold, Nosler and WBY.
Losing 2-5% BC may not sound like that big of a deal when someone tries to run a marginal twist rate, but it's the inconsistency in winter from Dawn at 25F to noon at 40F that will bite you in the *** when a monster bull or mulie is off at 700-800 yards and you hit them in the boobs instead of the vitals.
Thankfully 99% of our customer base is using the appropriate twist and we are providing most of the blanks that are running high performance 257.
1:8 for WBY is perfect. My 257 WBY earned 16th of 191 posted scores at the Nightforce ELR Steel Challenge last weekend in Glenrock Wyoming. We shot out to 2200 yards and I never practice. 3404 fps is the slower load I ran due to summer temps.
My business partner earned 3rd place Hunting Division with a 25 SAUM hunting rifle running 3325 fps.