Quoted: ...what do you suggest for a nice "anti-zombie" round in 357mag?
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I shot my new Marlin for the first time on Saturday the 20th, and brought along a Chrony chronograph to test ammunition. I tried Sellier & Bellot, Mag-Tech and American Eagle cartridges, all JSP 158 grain.
All ammunition was fired more than 10 times. The barrel was cleaned between each brand. One of each, the highest & lowest velocities were discarded to normalize the results. Here they are:
Sellier & Bellot
Avg Velocity 1434.69 - Extreme Spread 46 - Std Deviation 15.98
Mag-Tech
Avg Velocity 1689.25 - Extreme Spread 41 - Std Deviation 12.16
American Eagle
Avg Velocity 1853.50 - Extreme Spread 21 - Std Deviation 7.36
The Sellier & Bellot had the accuracy advantage at 25 yards, but opened up to a larger group than the American Eagle after that.
The Federal American Eagle is a really great ammunition, considering it sells for nearly the same price as the other two, but out performs them both out to 75 yards for velocity & accuracy.
Wave; I punched some numbers into Load from a Disk last night. If I have the correct BC for the 158gr JSP bullet, and I think I do at .17, then the math sez the AM 158gr JSP passes 100yrds with more velocity than out of the muzzle of a pistol.
If you think a 158gr JSP fired from a Colt Python can kill your zombie at 6ft, then the Marlin will give you the same results at 100yrds!