Slightly off-topic. Never seen this company before, but they have some 777 grain 45-70 loads. I just order a few boxes to see how they do.
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Twist Rate Stability Calculator
Our newly updated Twist Rate Stability Calculator not only tells you what your SG is, but it also lets you know if you are reaching your optimized BC.bergerbullets.com
It appears that it will stabilize in the typical 1:20 twist, per the Berger Calculator.
BC: 0.869 estimated (https://blackbasin.com/tools/coefficient-calculator/) (as a round nose model)
Caliber: 0.458"
Weight: 777 grains
Length: 1.645" (based on back calculating the length of a .458 diameter cylinder of lead that weights 777gr)
Mv: 1050fps
Twist: 1:20 (Typical Marlin 1895 twist rate)
Temp: 70F
Altitude: 1000ft
I'd still test a few unsuppressed before risking wiping out some baffles/end cap.


