The cast bullet is the NEI 411-350 GC #225A. Get it made with the driving band (what they call the DD style) as you set them up so the DD just catches the lands. Shoot it in my 400 Whelen, modern (.411) 40-82 and 400 H&H (all w/same twist). You can push it as fast as lead will take. Not too aerodynamic but very impressive on culling steers and will hold 1.5 moa or better.

Don't know if Swift still makes the 400 gr spitzer A-Frame but was the most accurate and aerodynamic 400. The 400 gr X (I have a hoard) is just a bit too long for best accuracy. It will hold 2" in the 400 H&H which is "minute of anything" I'd ever use that for !

Funny you mention the LH RFS, Back when I had the RFS collection, I had a LH one that had a 12" pull as it was made for some oil baron's daughter. Forgotten if Mike got it or not as we did a lot of RFS trading. Down to 4 now, the short action Hornet, two "one offs": 22-06 & 6.5x55 and the 400 W.

6.5 & 22-06

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SA Hornet and 400 W

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There is more "expert gunwriter" BS about the 400 Whelen than anything else cept maybe the 220 Swift.
If I were building a new .411, I'd go with Zeglin's .411 Hawk. It too is a slammer.

Here's neat pair of southpaw RFSs made for the same guy in 1935.
One a 257 Bob the other an 06'. Left stock, right bolt and 100% factory engraved. Even with the ancient Zeiss scopes they were both MOA rifles ! Part of my former collection.

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Course if you really "wanna get er done" 1.4 ounces of lead @.610 with lots of 2F is also reasonably effective (GRIN).
Even if it dates to 1809 and is a "flinter".

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