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parent case for 40-70 sharps straight (Read 438 times)

bullshop Senior Forum Member Offline Posts: 363 Joined: Sep 14^th, 2017	parent case for 40-70 sharps straight Jun 6^th, 2026 at 5:00pm	Print Post
	What is the parent case being used to form 40-70 Sharps straight cases ?


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.22-5-40 Oldtimer Offline Posts: 828 Joined: Feb 13^th, 2010	Re: parent case for 40-70 sharps straight Reply #1 - Jun 6^th, 2026 at 5:05pm	Print Post
	Buffalo Arms uses .30-40 Krag case stretched to length.


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1Hawkeye Senior Forum Member Offline Posts: 268 Location: South end of Northern Virginia Joined: Jun 29^th, 2019	Re: parent case for 40-70 sharps straight Reply #2 - Jun 6^th, 2026 at 5:17pm	Print Post
	Yep .30-40 Krag or .303 British. The Krag has a little thicker rim.


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bullshop Senior Forum Member Offline Posts: 363 Joined: Sep 14^th, 2017	Re: parent case for 40-70 sharps straight Reply #3 - Jun 6^th, 2026 at 5:25pm	Print Post
	So if a person does not posses the ability to stretch the case can the 405 Win case be used ? I have a bunch of those.


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Ranch13 Oldtimer Offline Posts: 636 Location: East Central Wy. Joined: Jan 20^th, 2018	Re: parent case for 40-70 sharps straight Reply #4 - Jun 6^th, 2026 at 6:26pm	Print Post
	bullshop wrote on Jun 6^th, 2026 at 5:25pm: So if a person does not posses the ability to stretch the case can the 405 Win case be used ? I have a bunch of those. Yes you can shorten the 405 cases. But the thing you might run into is the rim recess for a rifle cut for 30-40 cases might not let the thicker rim of the 405 cases seat and close the breech.


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 18036 Location: Oregon Joined: Feb 2^nd, 2009	Re: parent case for 40-70 sharps straight Reply #5 - Jun 7^th, 2026 at 10:58am	Print Post
	I use nothing but .405 Win. cases in my .40-70SS rifles, and .40-70 Ballard rifles. No issues with 8 of them I use with .405 brass.

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Oakdale Full Member Offline Posts: 103 Location: Maplewood, MN Joined: Jun 7^th, 2017	Re: parent case for 40-70 sharps straight Reply #6 - Jun 7^th, 2026 at 12:23pm	Print Post
	When I ordered my Model 74 Sharps from CSA in 2010, I told them I’d be using Hornady cases. Case rims have never been a problem. I’m still using the original (150) cases and have (3) unopened boxes of (50) each. I do anneal cases every fall after all the shooting is done. Tom


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cadyk Participating Member Offline Posts: 10 Joined: Apr 13^th, 2026	Re: parent case for 40-70 sharps straight Reply #7 - Jun 7^th, 2026 at 2:12pm	Print Post
	My.40-70 SS was chambered especially for the shortened .405 Hornady cases. The cases are thicker than the reformed .30-40 brass-my chamber is ~0.002" larger in diameter at the 2.5" point than the reformed brass. I've read that some chambers, like Shilohs, are too tight to handle a 0.408" bullet in their standard chambers, but I think think they will chamber for the Hornady brass on demand. cadyk


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Win1906 Participating Member Offline Posts: 22 Location: altona,ny Joined: Mar 28^th, 2026	Re: parent case for 40-70 sharps straight Reply #8 - Jun 8^th, 2026 at 11:03pm	Print Post
	i tried the 405 hornady brass and they are too think to chamber a .406 bullet.rockey mountain brass chambered fine


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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 18036 Location: Oregon Joined: Feb 2^nd, 2009	Re: parent case for 40-70 sharps straight Reply #9 - Jun 9^th, 2026 at 2:49pm	Print Post
	Win1906 wrote on Jun 8^th, 2026 at 11:03pm: i tried the 405 hornady brass and they are too think to chamber a .406 bullet.rockey mountain brass chambered fine that's strange. My guns all use a .410"-.411" bullet and chamber easily with .405 brass.

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bobw Frequent Elocutionist Offline Posts: 2107 Location: NW, Iowa Joined: Mar 19^th, 2013	Re: parent case for 40-70 sharps straight Reply #10 - Jun 9^th, 2026 at 6:21pm	Print Post
	Win1906 wrote on Jun 8^th, 2026 at 11:03pm: i tried the 405 hornady brass and they are too think to chamber a .406 bullet.rockey mountain brass chambered fine I think you need to shorten the 405 brass to use in an original 40-70ss chamber. If you haven’t, that may be your problem, especially since they work for others. You should verify this with a chamber cast. I have two 40-70ss rifles but both are chambered with a reamer that allows the use of unmolested 405 brass, length and rim thickness. I just resize using an original 40-70ss die. Bob

	Robert Warren
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beltfed Frequent Elocutionist Offline Posts: 1824 Location: Central Wi Joined: Dec 20^th, 2007	Re: parent case for 40-70 sharps straight Reply #11 - yesterday at 2:11pm	Print Post
	The use of the full length 405W cases in your BPCR rifle can be considered a Win 40-72W as this is the same length as the 405W. Winchester had come out with the Black Powder 40-72W (and the 38-72W) for the M1895 lever gun and the 1885 Hi Wall then "modernized" it into the 405W smokeless loads. They incrreased the rim thickness for the 405 to avoid issues in use of the new higher pressure 405 in older 40-72s. I have a "40-72 match reamer" bought from Dan Theodore that is in fact designed around the 405W Hornady brass. It was used to chamber my rebarrelled 40-72 BPCR Ruger No. 1. beltfed/arnie


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Win1906 Participating Member Offline Posts: 22 Location: altona,ny Joined: Mar 28^th, 2026	Re: parent case for 40-70 sharps straight Reply #12 - yesterday at 8:38pm	Print Post
	every rifle is different but shortned 405 brass does not chamber in my 40-70 but original brass and rocky mountain brass do.just try 1 loaded round first dont shorten 10 405 brass then relize there to thick to chamber


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