ASSRA Forum - Ream .43 Spanish chamber neck for .446 bullets?

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Ream .43 Spanish chamber neck for .446 bullets? (Read 3033 times)

ohland Participating Member Offline Posts: 37 Joined: Dec 11^th, 2012	Ream .43 Spanish chamber neck for .446 bullets? May 29^th, 2015 at 6:51pm	Print Post
	Folks, I have a .43 Spanish Rolling Block, 11.15x58R, bore is beautiful! Sparkly clean inside, looks modern... But I cast the muzzle with Cerrosafe, and it is a .439 bore with a .446 groove. Downside is that the chamber will not allow a .446 boolit to chamber (Jameson .43 Spanish brass from BACO). Just a few thousandths too big. So the options are to either use a soft .439 boolit and let BP loads bump it up, or ream out the neck of the chamber only, so I can use the fantastically fine casting RCBS 44-370-FN (drops at .439 bore and .446 groove). One of the Cast Boolits forum members remembers John Campbell reaming just the neck in the ASSRA Journal. Does anyone remember the issue? Arrgghhh... Bent Ramrod said: "I seem to recall that John Campbell wrote an article in the ASSRA Journal about reaming the neck only of a .43 Spanish chamber so that inside lubricated boolits of the proper size could be loaded into the cases."


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frnkeore Frequent Elocutionist Online Posts: 7354 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: Ream .43 Spanish chamber neck for .446 bullets? Reply #1 - May 29^th, 2015 at 9:42pm	Print Post
	It would be much faster, keep it original and be much cheaper, if you turn the necks instead. Measure the ID on a fired case and either ID ream or OD turn the amount to seat a bullet. Frank

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nuclearcricket Oldtimer Offline Posts: 774 Joined: Oct 15^th, 2008	Re: Ream .43 Spanish chamber neck for .446 bullets? Reply #2 - May 30^th, 2015 at 3:33pm	Print Post
	Another option would be to get some 43 bullets and shoot them over Black Powder and see how they work. They may surprise you and shoot well even in the slightly oversized bore. A Spanish in excelent shape may surprise you and shoot very well. I have a friend that has one in near mint condition and its an excellent shooter, but I dont know what his bore/grove size is. Sam


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uscra112 Frequent Elocutionist Offline Posts: 4079 Location: Switzerland of Ohio Joined: May 7^th, 2007	Re: Ream .43 Spanish chamber neck for .446 bullets? Reply #3 - Jun 4^th, 2015 at 6:01am	Print Post
	My 71/84 Mauser has the same condition. Received wisdom is that it was done with paper patched dead-soft swaged bullets in mind. I found a quantity of original ammunition, and sure enough, the bullets are dead-soft, swaged, and "undersize", relying on obturation to fill the grooves. Makes sense for a black-powder military rifle that must be shot dirty.

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marlinguy Frequent Elocutionist Offline Ballards may be weaker, but they sure are neater! Posts: 16425 Location: Oregon Joined: Feb 2^nd, 2009	Re: Ream .43 Spanish chamber neck for .446 bullets? Reply #4 - Jun 4^th, 2015 at 9:16am	Print Post
	Another option would be to run a .44-77 SBN reamer into the chamber, and then use your .43 Spanish brass still. It would give your gun the larger neck size, and retain the present cartridge.

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