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Quest for a 40-50 Sharps Straight chamber drawing (Read 3235 times)

Premod70 Oldtimer Offline Posts: 864 Location: North Carolina Joined: Jan 16^th, 2016	Quest for a 40-50 Sharps Straight chamber drawing May 13^th, 2018 at 10:03am	Print Post
	I have a interest in a 40-50 Sharps Straight rifle and don't have a clue what is the correct deminsions for this rifle's chamber especially the ball seat to the rifling transition. Any drawings or links to such is greatly appreciated.


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nuclearcricket Oldtimer Offline Posts: 741 Joined: Oct 15^th, 2008	Re: Quest for a 40-50 Sharps Straight chamber drawing Reply #1 - May 13^th, 2018 at 10:59am	Print Post
	If you find someone that lists that reamer, such as PT&G or Mason reamers, if you contact them they will send you a drawing. It used to be that some of them had links on their sites to the drawings for the reamers listed, seems they don't do that any more. Sam


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Redsetter Frequent Elocutionist Offline Posts: 3468 Location: New York Joined: Aug 6^th, 2013	Re: Quest for a 40-50 Sharps Straight chamber drawing Reply #2 - May 13^th, 2018 at 11:02am	Print Post
	Can't find a drawing, but the SPG BP Manual says that cases can be formed from .30-40 or .303 cases cut to a length of 1-7/8 in., which should give you a rough idea of chamber dimensions. If you can't find a drawing, you could make a chamber cast & measure it.


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rkaires Frequent Elocutionist Offline No Stronger Bond Posts: 1630 Location: Dingmans Ferry, PA Joined: Oct 26^th, 2012	Re: Quest for a 40-50 Sharps Straight chamber drawing Reply #3 - May 13^th, 2018 at 1:04pm	Print Post
	Here's the print from CPA's reamer.

	(You need to *Login* or *Register* to view media files and links) ( 83 KB \| 138 Downloads ) ASSRA #11031 NRA Life Proud Noodlehead "Peace is that brief, glorious moment in history, when everybody stands around reloading."~ ~ Thomas Jefferson
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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 16009 Location: Oregon Joined: Feb 2^nd, 2009	Re: Quest for a 40-50 Sharps Straight chamber drawing Reply #4 - May 13^th, 2018 at 2:25pm	Print Post
	Not sure the .40-50 Shiloh Sharps Straight is exactly like the original version? I have a Rolling Block Sporting Rifle in this caliber and I'll do a chamber cast to see what it looks like. I do use .303 British brass to make the cases, and they're very easy to rework. It might be after the Denver gun show next week before I can make a casting, as I'm a bit busy getting things ready for a Tuesday departure.

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Longdistance1 Senior Forum Member Offline Posts: 429 Location: Amidon, ND Joined: Feb 11^th, 2013	Re: Quest for a 40-50 Sharps Straight chamber drawing Reply #5 - May 13^th, 2018 at 4:28pm	Print Post
	Clymer reamer


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Premod70 Oldtimer Offline Posts: 864 Location: North Carolina Joined: Jan 16^th, 2016	Re: Quest for a 40-50 Sharps Straight chamber drawing Reply #6 - May 15^th, 2018 at 8:57am	Print Post
	Longdistance1 wrote on May 13^th, 2018 at 4:28pm: Clymer reamer I have a question on the drawing, does the figure "0.150" include the ball seat and leade/freebore as a total? I don't wish to start a discussion of chamber terminology, just would like to know the distance from the case to the start if the riflings, the picture is a little too hazed for me to read. Thanks to all that have replied.


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Longdistance1 Senior Forum Member Offline Posts: 429 Location: Amidon, ND Joined: Feb 11^th, 2013	Re: Quest for a 40-50 Sharps Straight chamber drawing Reply #7 - May 17^th, 2018 at 2:13am	Print Post
	It's .410 at the end of the case and .400 app 1/8" ahead. About .300 from end of case to bore diameter. Figgering a .060 rim case length would be about 1.890 max. HTH, LD1


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bruce moulds Senior Forum Member Offline Posts: 290 Location: the antipodes Joined: Mar 14^th, 2015	Re: Quest for a 40-50 Sharps Straight chamber drawing Reply #8 - May 19^th, 2018 at 2:07am	Print Post
	the drawing above seems to show a 45 degree transition. the originals were 4 to 7 degree, and far more suited to cast bullets fixed ammo. in modern times some of us think that moderner is better, but it is not always the case. the odg knew what they were doing on this issue. keep safe, bruce.

	ventum est amicus meus
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Premod70 Oldtimer Offline Posts: 864 Location: North Carolina Joined: Jan 16^th, 2016	Re: Quest for a 40-50 Sharps Straight chamber drawing Reply #9 - May 19^th, 2018 at 10:01am	Print Post
	bruce moulds wrote on May 19^th, 2018 at 2:07am: the drawing above seems to show a 45 degree transition. the originals were 4 to 7 degree, and far more suited to cast bullets fixed ammo. in modern times some of us think that moderner is better, but it is not always the case. the odg knew what they were doing on this issue. keep safe, bruce. Interested about the 4-7 degree transition angle, what type bullet nose and front band combination were they using?


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bruce moulds Senior Forum Member Offline Posts: 290 Location: the antipodes Joined: Mar 14^th, 2015	Re: Quest for a 40-50 Sharps Straight chamber drawing Reply #10 - May 19^th, 2018 at 6:38pm	Print Post
	they were mostly using pp bullets and some greasers. the lower transition angle avoids both paper and lead rings. keep safe, bruce.

	ventum est amicus meus
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Premod70 Oldtimer Offline Posts: 864 Location: North Carolina Joined: Jan 16^th, 2016	Re: Quest for a 40-50 Sharps Straight chamber drawing Reply #11 - May 19^th, 2018 at 10:13pm	Print Post
	To a point I can see that working, thanks.


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