ASSRA Forum - Re: Making .40-70SS from .30-40 Krag

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Re: Making .40-70SS from .30-40 Krag (Read 10506 times)

ledball Frequent Elocutionist Offline Posts: 1021 Location: syracuse, ohio Joined: Nov 20^th, 2009	Re: Making .40-70SS from .30-40 Krag Mar 26^th, 2016 at 6:54pm	Print Post
	405 Win brass is what you need if you can find some. Ledball


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Deadeye Bly Frequent Elocutionist Offline Posts: 1146 Location: Stephens City Joined: Feb 25^th, 2011	Re: Making .40-70SS from .30-40 Krag Reply #1 - Mar 26^th, 2016 at 8:28pm	Print Post
	Before 405 brass and Captech brass became available Baco(Buffalo Arms) used to sell a stretched 30-40 Krag brass for the 40-70SS. At one time it was about all that was available for the 40-70SS. Times have changed.


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Tom_Trevor assra life no.71 Oldtimer Offline Tom Trevor Posts: 713 Location: Granada Hills Ca. Joined: Jun 16^th, 2004	Re: Making .40-70SS from .30-40 Krag Reply #2 - Mar 26^th, 2016 at 8:54pm	Print Post
	And just think soon 30-40 Krag will be made from 40-70 Sharps straight !!!!


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coljimmy Senior Forum Member Offline Posts: 283 Joined: Nov 10^th, 2012	Re: Making .40-70SS from .30-40 Krag Reply #3 - Mar 26^th, 2016 at 11:51pm	Print Post
	I shot my 40-70 SS with modified 30-40 and also a few modified 303 Brit cases. The Krag blew out slightly longer, so I preferred it as I had to seat the bullet out more for the 303. No problem with it, except for some extraction failures on the original Sharps, but I didn't try for extreme accuracy, just fun. I annealed it before fire forming with a propane torch just watching for the color change. For a while, you could get 30-40 "basic", but I haven't seen any lately. Just got some "store bought" 40-70, but haven't loaded it yet. James


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coljimmy Senior Forum Member Offline Posts: 283 Joined: Nov 10^th, 2012	Re: Making .40-70SS from .30-40 Krag Reply #4 - Mar 27^th, 2016 at 3:06pm	Print Post
	I blew out 7x57R for my 40-70 Ballard and it worked except for the smaller rim. "Same as" 40-63 everlasting Ballard. I would see if you could chamber 30-40 first as the base would be the tight fit. The Ballard is slightly shorter than Sharps SS, so less seat out. James


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uscra112 Frequent Elocutionist Offline Posts: 4079 Location: Switzerland of Ohio Joined: May 7^th, 2007	Re: Making .40-70SS from .30-40 Krag Reply #5 - Mar 30^th, 2016 at 1:49am	Print Post
	Just a day or two ago I posted elsewhere that Captech has .35 Winchester brass, from which .30-40 can be made. It is longer than .30-40, so might work better for making .40-70

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.22-5-40 Oldtimer Offline Posts: 828 Joined: Feb 13^th, 2010	Re: Making .40-70SS from .30-40 Krag Reply #6 - Mar 30^th, 2016 at 2:00pm	Print Post
	Tom....I don't think your too far off in thinking .30-40 Krag from .40-70SS....Back in the early 1890's, when the U.S. military was looking for a more up to date ctg. than the old .45-70..the boys at Frankford arsenal probably looked at the .40-70 SS & thought...bottlenecked and slightly shortenend....The rest is history.


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oneatatime Frequent Elocutionist Offline Posts: 4482 Location: Rocky Mountains Joined: Oct 30^th, 2011	Re: Making .40-70SS from .30-40 Krag Reply #7 - Mar 30^th, 2016 at 6:32pm	Print Post
	Gee, and I thought they looked at the 38-50 Remington Hepburn;-) Was it a solid head case by then?


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Joe Do... Oldtimer ASSRA Board Member ASSRA Journal Editor Offline Posts: 663 Location: 'burbs of Chicago Joined: May 19^th, 2012	Re: Making .40-70SS from .30-40 Krag Reply #8 - Apr 7^th, 2016 at 9:03pm	Print Post
	Doesn't CapTech make 40-70 SS brass already? I seem to remember buying a bunch from them a year ago or so? ... Joe


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uscra112 Frequent Elocutionist Offline Posts: 4079 Location: Switzerland of Ohio Joined: May 7^th, 2007	Re: Making .40-70SS from .30-40 Krag Reply #9 - Apr 7^th, 2016 at 11:26pm	Print Post
	Joe Do... wrote on Apr 7^th, 2016 at 9:03pm: Doesn't CapTech make 40-70 SS brass already? I seem to remember buying a bunch from them a year ago or so? ... Joe Is this it? (You need to *Login* or *Register* to view media files and links)

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BP Frequent Elocutionist Offline Posts: 8039 Location: Westside Joined: Aug 27^th, 2006	Re: Making .40-70SS from .30-40 Krag Reply #10 - Apr 8^th, 2016 at 12:12am	Print Post
	Back in the 1960's, some fella named George C Nonte Jr. recommended making 40/70 Sharps Straight from 9.3x74R brass.

	There are three kinds of men: The ones that learn by reading, the few who learn by observation, and the rest who have to pee on the electric fence and find out for themselves. Proud Noodlehead
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Deadeye Bly Frequent Elocutionist Offline Posts: 1146 Location: Stephens City Joined: Feb 25^th, 2011	Re: Making .40-70SS from .30-40 Krag Reply #11 - Apr 8^th, 2016 at 7:57am	Print Post
	Yes they can be made from 9.3 x 74 brass but the rim is too thin. There is no need to make them from anything else today with proper head stamp brass available from Captech.


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BP Frequent Elocutionist Offline Posts: 8039 Location: Westside Joined: Aug 27^th, 2006	Re: Making .40-70SS from .30-40 Krag Reply #12 - Apr 8^th, 2016 at 2:23pm	Print Post
	Who said guns were supposed to be an inexpensive hobby? There are ways to take care of the thin rim on the 9.3x74R. And the 30-40 rim isn't quite right for an original 40-70 SS chamber either.

	There are three kinds of men: The ones that learn by reading, the few who learn by observation, and the rest who have to pee on the electric fence and find out for themselves. Proud Noodlehead
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Pablom Participating Member Offline Posts: 36 Joined: Apr 17^th, 2016	Re: Making .40-70SS from .30-40 Krag Reply #13 - Apr 18^th, 2016 at 9:42pm	Print Post
	I have a question with this too, what size bullet are you using in the Hepburn? I've tried .403 ( the chamber coasted at around .409) but they don't like to chamber too well even at .403. These cases are thin and I did try neck reaming too some fit better than others...... I'm using both 30-40 parent cases that I blew out after annealing. And some real 40-70 SS cases I got from Buffalo arms. I kind of gave up on it. I didn't know if anyone else ever saw this tight of chamber? Thanks


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Longdistance1 Senior Forum Member Offline Posts: 468 Location: Amidon, ND Joined: Feb 11^th, 2013	Re: Making .40-70SS from .30-40 Krag Reply #14 - Apr 19^th, 2016 at 11:39am	Print Post
	Pablom What is the bore and groove size of your Hepburn BBL? I have an old 59 or 63 Sharps 40-70 with a tight chamber and a .4125 groove dia, I used a Lyman 410610 GC pistol bullet with the gc portion seated in the case on top of a grease cookie, unsized unlubed bullet so that they didn't collect dirt cases trimmed so that the bullets were against the lands, shot well to 200 yds. Unsized bullets were still undersized at .411 Hope this helps. Longdistance1


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