Many jurisdictions only allow straight-wall centerfire cartridges during rifle season. And many of those have a 1.80" case-length maximum.
Such a cartridge based on the ubiquitous 30-30 family of brass makes good sense as the cheapest, most readily available rimmed brass. Both the 400 GNR and the 375 Win are straight-wall cartridges in the 30-30 family, but both exceed the 1.80" case limitation. Hence, I think we need a shorter version of the 400 GNR, call it the 40 GNR.
I'd propose one of the following case lengths for the 40 GNR:
1.29" - to match the common magnum pistol cartridges
1.383" - to match 454 Casull
1.61" - matching 357 maximum and the supermagnums
1.80" - maxing out the 1.80" allowance
A 1.29" case length would allow chambering in most any common revolver, though it's pretty close to being a 401 power mag.
A 1.383" case length can offer something unique to the market, and if cut-down 375 Win brass is used, something approaching Casull pressures can be used. Would be too long to chamber in Smiths, but Blackhawks and Redhawks would work fine.
A 1.61" case could still be chambered in stretch framed revolvers, while approaching carbine power-levels
A 1.80" case obviously maxes out the limit. I'd expect this to cycle best in any lever actions previously chambered for 400 GNR, though much to long to chamber in any revolver.
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We need a 40 GNR
- Keith, 2022-09-18, 01:05
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400 GNR in an encore, cut case to 1.8" then load, no problem (nm)
- Sean Harper, 2022-09-19, 09:40
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You would have to work up new loads but I am
- Sean Harper, 2022-09-19, 09:50
- The Starline .38-55 Win. brass, if you can find them - WB, 2022-09-19, 11:07
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You would have to work up new loads but I am
- Sean Harper, 2022-09-19, 09:50
- .40-50 Sharps Straight is 1.875 inches - Pacecars, 2022-09-19, 02:57
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Something larger than .30-30 would be better
- WB, 2022-09-18, 06:13
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The 30-30/375 Win case is the point
- Keith, 2022-09-19, 10:02
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Yes .414 would be a unperceivable taper
- WB, 2022-09-20, 07:39
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I started to get into this "conversation" but
- Gary Reeder, 2022-09-20, 13:33
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True. As much as I love the odd .400 there
- WB, 2022-09-21, 14:23
- I've the same feelings about the 454 - AmBraCol, 2022-09-24, 15:16
- I don't think the goal is to get 454 performance - Keith, 2022-09-20, 14:20
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True. As much as I love the odd .400 there
- WB, 2022-09-21, 14:23
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I started to get into this "conversation" but
- Gary Reeder, 2022-09-20, 13:33
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Yes .414 would be a unperceivable taper
- WB, 2022-09-20, 07:39
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The 30-30/375 Win case is the point
- Keith, 2022-09-19, 10:02
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Or you could use the 460S&W case
- Blake, 2022-09-18, 04:09
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No problem. All it takes is 12 to 14 months and $2000
- Gary Reeder, 2022-09-18, 14:42
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The simplest and cheapest way to go is the 445 Super Mag.
- Gary Reeder, 2022-09-18, 14:53
- 30-30 more common 445, 375 Win close enough to 454 brass (nm) - Keith, 2022-09-19, 10:08
- The whole spirit of these laws are to open - WB, 2022-09-19, 06:34
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The simplest and cheapest way to go is the 445 Super Mag.
- Gary Reeder, 2022-09-18, 14:53
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No problem. All it takes is 12 to 14 months and $2000
- Gary Reeder, 2022-09-18, 14:42
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400 GNR in an encore, cut case to 1.8" then load, no problem (nm)
- Sean Harper, 2022-09-19, 09:40