MT...I talked to Marshall today and we discussed this cartridge in depth...It's time we, the forum, had our own .416 built around Marshalls bullets. That's what this is all
about. It's designed @ 2.465" OAL...That's just under what is the limit on the Marlin. It has a 50/52 gr powder capacity with an Expansion Ratio in a 20/22" barrel of 12...and that's extra good. Planned velocity with 335 gr BT @ 2050'/". Working pressure is within the Marlin's limits. It will not be on the.450 Marlin case!!!!
The neck is designed so that the 375 gr bullet's base is at the bottom of the neck. Of course, it will also br good with jacketed bullets. There is only two toolpost grinder setups to convert the reamers for the new cartridge from the .457 x 2" American.
You know, MT...There's a lot of difference in building wildcat rifles and designing a resonable wildcat. I did this one for all my friends on the forum that likes .416's. Marshall is setting the chamber throats and leades for his bullets. He is setting the twist @ 1 turn in 18 inches, I think. It will work in lever guns, bolt guns ( medium and long actions), single shots, and even be good down to about 16" with ER of 10 for
[email protected] close to 2000 fps with the 335 gr....that's heavy duty!
I think I might put one on a Ruger No 3 with a rather heavy 22" barrel. It would still be light and short.
Well...I've worked on this thing for three days and nights...checking and rechecking all calculations and spec drawings. We are down to the home stretch and want to go public before someone gets ahead of us!
Best Regards from The Hammock.....James