.40-82 vs. .405

[Marlin Junky]

It appears the .40-82 and the .405 have pretty similar capacities although I think there's an advantage to owing a .40-82 because cases can be made from .45 Basic or even 45-90 brass. Does anyone have the exact water capacity of the .40-82 and the .405?

MJ

[Urny]

According to The Handloader's Manual of Cartridge Conversions, by John J. Donnelly, it's 79.38 grains water for the 40-82 and 76.89 grains water for the 405.

[Marlin Junky]

Urny,

Thanks for the quick reply. Do you have water capacities for the 40-70 and 40-90 Sharps Bottlenecks too?

MJ

[KirkD]

For those water case capacities, do those numbers include the volume that the bullet would occupy? If so, then the .40-82 had a lighter bullet than the .405, so the actual capacity of the .40-82 might be even higher still.

[Urny]

You are welcome, sir. Donnelly refer to 40-70 and 40-90 Sharps necked; assuming those to be the same as Sharps Bottleneck, capacity in water grains is 80.94 and 92.57 respectively. Capacities are theoretical based on outside dimensions, filled to the case mouth.

[Marlin Junky]

Urny,

So the 40-70 Sharps Necked actually has a little more volume than the 40-82 Winchester even though the latter is a little longer (2.4" vs. 2.25"). Then there's the 40-90 SN which I've heard became one of the more popular Sharps cartridges. Basically, what I'm doing is looking at options for a paper patching rifle, but to get started I may just have a 45-70 barrel fitted to my Handi-Rifle. :-D

MJ

P.S. Sorry, I'll move this off the levergun forum if I feel the need to pursue pp boolits in ss rifles.