.375 Ruger?

[JustJim]

The .40-65 is a .45-70 necked down to .40 caliber. The .405 Winchester is almost a 30-40 Krag blown out (the Krag case is a bit short); IIRC the .40-70 Sharps Straight is on the .405 case. The .40 Krag is a .30-40 blown out straight. In a 98 Krag action, the 35 Krag will usually feed without issue, but the .375 Krag and .40 Krag can take some work on the magazine. Nonte wrote that he had seen a Krag in .405 Winchester, but I can't figure how it would feed; the only one I've seen was a single-shot.

The .400 Whelan and .400 Brown-Whelan (and the .411 Hawk) are all based on the .30-06 case, but probably best made from cylindrical brass rather than blowing out .30-06 brass. Doing it this way makes it easier to get the shoulder right and eliminate any issues (not much shoulder on the case).

 

[RBHarter]

So get the 45-70 AR brass run it in the 40-65 die and viola' 40-65 with .473 rim .

 

[JustJim]

So get the 45-70 AR brass run it in the 40-65 die and viola' 40-65 with .473 rim .

That. . . might work. I'd have to mic a few cases and check water capacity, but you might be able to wind up with the equivalent or near-equivalent of a .400 Whelan in a short action. Or maybe a big-bore conversion on a Savage 99. . . off to the Savage forums to check some things out, wonder if I could get a 9.3x284 to feed!

 

[RBHarter]

I forget the specifics but the head area on the AR vs 284 Win was like .001-2 larger so in action it was moot .
I know a guy that had an 86' and did a 308 neck and 40°(50° it was less than 45°) shoulder stating the case capacity was the same as 06' and using 06 data gave 06' numbers for the 30/45-70 cartridge.

I hadn't even thought about a 284 99 becoming a 45-70 ........ Wow that would confuse some game wardens...

 

[todd]

That. . . might work. I'd have to mic a few cases and check water capacity, but you might be able to wind up with the equivalent or near-equivalent of a .400 Whelan in a short action. Or maybe a big-bore conversion on a Savage 99. . . off to the Savage forums to check some things out, wonder if I could get a 9.3x284 to feed!

i have two 1898 Spr Armory actions and i was thinking of 9.3 Krag (9.3/30-40 Krag). i have a Husqvarna m46 in 9.3x57 and i just love it. i think that that Europeans have a secret caliber that they refuse to give the USA.