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Design of reduced capacity cases. (Read 17425 times)

40_Rod Frequent Elocutionist Offline Extremism in the persuit of accuracy is not a vice Posts: 4285 Location: Knoxville, TN Joined: Apr 20^th, 2004	Re: Design of reduced capacity cases. Reply #15 - Jan 2^nd, 2014 at 8:50am	Print Post
	COW works great in straight or bottle necked cases with a very gentle bottleneck. But I have seen cow split a case in half with bottle necked cases leaving the neck and transition stuck in the chamber. 40 Rod


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Chickenthief Junior Member Offline Posts: 81 Location: Here Joined: Aug 5^th, 2013	Re: Design of reduced capacity cases. Reply #16 - Jan 2^nd, 2014 at 3:13pm	Print Post
	Would'nt filling the case with molten lead/tin be nasty? I'm thinking softening of the case head. What about taking 5-10 and fill the case say half way up with epoxy. First insert a toothpich in the flash hole so it wont bleed out. Do the filling on a scale so the remaning volume will be the same for each case. Now redrill the flash hole into a flash channel. Experiment until you find what suits you and your powder/bullet combo. Now measure remaning case capacity with water on a scale and give that volume to RMC. Cases will be right the first time.


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Cat_Whisperer Frequent Elocutionist Offline No 1, 9.3x74R Posts: 3878 Location: Mountains of Virginia Joined: Apr 17^th, 2004	Re: Design of reduced capacity cases. Reply #17 - Jan 2^nd, 2014 at 5:09pm	Print Post
	Chickenthief wrote on Jan 2^nd, 2014 at 3:13pm: Would'nt filling the case with molten lead/tin be nasty? I'm thinking softening of the case head. ... Won't know until I try it. Alloy (tin-silver-copper) will be at about 400-500 - I'll measure it. THICKNESS of the material (brass + tin alloy) will be substantial. Hardness of the alloy will be up there, don't know about tensile strength. BUT, these with reduced capacity are for reduced cast-bullet loads; therefore for lower pressures. Good point, though, thanks.

	Cat Whisperer (trk) Chief of Smoke Pulaski Coehorn Works and Skunk Works Drafted May 1970, Retired Maj. U.S.Army assra #9885
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joeb33050 Frequent Elocutionist Offline Posts: 2613 Location: Marathon, FL Joined: Apr 20^th, 2004	Re: Design of reduced capacity cases. Reply #18 - Jan 5^th, 2014 at 11:04am	Print Post
	I don't have a 30-06 case. A 223 Rem case will fit in a 375 H&H case. With the 223 neck expanded to make me feel safer, a second 223 case will go in, on top of the first one. Trimmed to the required length the mouth of the second case will be inside the mouth of the 375 case, making a stop for the bullet and controlling OAL. Drilling the primer pockets out allows the primer to work. Expanding the bottom 223 case mouth, it looks like a 32 Auto case would fit in, reducing case capacity more. You could leave the whole megillah together, or take it apart at each reloading. Powder funnel design is important here. It looks like a 223 case will fit in a 30-06 case, if the mouth is annealed and expanded. Then resized. The possibilities are endless.


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JLouis Frequent Elocutionist Offline Posts: 10625 Joined: Apr 8^th, 2009	Re: Design of reduced capacity cases. Reply #19 - Jan 5^th, 2014 at 11:36am	Print Post
	I think you are flirting with disastrous results that could possibly be life threating. RMC case are only a couple of dollars plus a little change each and mght be the safest approach used. Joe B your approach tops them all, a case or multiple cases inside a case would surely make for multiple projectiles trying to go down the barrel!

	" It Is Better To Now Have Been A Has Been Than A Never Was Or A Wanna Be "
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QuestionableMaynard8130 Frequent Elocutionist Offline Posts: 4144 Location: Benton Harbor MI Joined: Apr 17^th, 2004	Re: Design of reduced capacity cases. Reply #20 - Jan 5^th, 2014 at 1:37pm	Print Post
	sounds like an internal "suppressor"

	sacred cows make the best burger
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colo native Oldtimer Offline Posts: 760 Location: Barren Ridge, Va Joined: Dec 27^th, 2007	Re: Design of reduced capacity cases. Reply #21 - Jan 5^th, 2014 at 2:38pm	Print Post
	I think a call To Harlow Parkenfarker is in order, I'm sure he'l point ya in the direction, eh


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JLouis Frequent Elocutionist Offline Posts: 10625 Joined: Apr 8^th, 2009	Re: Design of reduced capacity cases. Reply #22 - Jan 5^th, 2014 at 3:45pm	Print Post
	I find a lack of humor in possible bodly harm.

	" It Is Better To Now Have Been A Has Been Than A Never Was Or A Wanna Be "
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Paul_F. Ex Member	Re: Design of reduced capacity cases. Reply #23 - Jan 5^th, 2014 at 3:49pm	Print Post
	Hey, these ideas are no nuttier than some of the crap in Donnelly's handbook of cartridge conversions... (I think that's the author and title)... He advocates brazing copper tubing to the case head the right size to form some obsolete cases... Dropping brass into another case to make a sub-capacity case would be right up his alley. Oh, and if I were dead set on being stupid enough to try something like that, I'd use Cerrosafe to hold the sub-sized brass in and centered. I'd be inclinded to let someone else (like JoeB) fire it for the first time though!


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rkaires Frequent Elocutionist Offline No Stronger Bond Posts: 1633 Location: Dingmans Ferry, PA Joined: Oct 26^th, 2012	Re: Design of reduced capacity cases. Reply #24 - Jan 5^th, 2014 at 3:55pm	Print Post
	joeb33050 wrote on Jan 5^th, 2014 at 11:04am: I don't have a 30-06 case. A 223 Rem case will fit in a 375 H&H case. With the 223 neck expanded to make me feel safer, a second 223 case will go in, on top of the first one. Trimmed to the required length the mouth of the second case will be inside the mouth of the 375 case, making a stop for the bullet and controlling OAL. Drilling the primer pockets out allows the primer to work. Expanding the bottom 223 case mouth, it looks like a 32 Auto case would fit in, reducing case capacity more. You could leave the whole megillah together, or take it apart at each reloading. Powder funnel design is important here. It looks like a 223 case will fit in a 30-06 case, if the mouth is annealed and expanded. Then resized. The possibilities are endless. This will be nominated for a Darwin award.

	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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BP Frequent Elocutionist Offline Posts: 8039 Location: Westside Joined: Aug 27^th, 2006	Re: Design of reduced capacity cases. Reply #25 - Jan 5^th, 2014 at 5:13pm	Print Post
	I'd like to see joeb conduct experiments of his proposed suggestion, and then present his findings to this forum.

	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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joeb33050 Frequent Elocutionist Offline Posts: 2613 Location: Marathon, FL Joined: Apr 20^th, 2004	Re: Design of reduced capacity cases. Reply #26 - Jan 5^th, 2014 at 5:14pm	Print Post
	JLouis wrote on Jan 5^th, 2014 at 11:36am: I think you are flirting with disastrous results that could possibly be life threating. RMC case are only a couple of dollars plus a little change each and mght be the safest approach used. Joe B your approach tops them all, a case or multiple cases inside a case would surely make for multiple projectiles trying to go down the barrel! Yeah, it would be HORRIBLE to try to drive a .375" dia empty case down a .375" barrel. If you filled the empty case with lead, even worse!!! Almost as bad as making 22 bullets out of fired 22 rf cases! Horrible!! (With primer pockets drilled out, what would drive the empty cases?)


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ssdave Frequent Elocutionist Offline Posts: 1798 Location: Eastern Oregon Joined: Apr 16^th, 2004	Re: Design of reduced capacity cases. Reply #27 - Jan 5^th, 2014 at 5:58pm	Print Post
	See if you can find some information on Rocky Gibbs experiments. He did a lot of soldering tubes into cases to make the cartridge front ignition on the powder, with lower pressures and higher velocities the result, as the burning powder gasified better without spiking pressures due to unburned powder bridging and unburned powder being blown down the barrel before it burned. At least his experiments tell you that a long primer flash tube isn't an obstacle. dave


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frnkeore Frequent Elocutionist Offline Posts: 7270 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: Design of reduced capacity cases. Reply #28 - Jan 5^th, 2014 at 6:05pm	Print Post
	This is not a new idea. Handloader Magazine published a article by Jim Carmichel sometime between 1966 and 1981 regarding this same thing. My sourse is "The art of Bullet Casting", a composition of Handloader article on cast bullets. I'm posting two pages of it. It was for the 308 but, I think it would probably work the same in a '06. It must of proven safe or, I don't think Handloader would have published it. I would have tried it but, I didn't think that the case walls would be very even or give enough reduction in capacity. That said, It would still be much better to let RMC do the work. Frank For some reason, it's not letting me up load the pictures. I'll try again later. Can anyone tell me what this means? Error -101 when loading url (You need to *Login* or *Register* to view media files and links) Both pictures are under 500kb
	« Last Edit: Jan 5^th, 2014 at 7:12pm by frnkeore »
	ASSRA Member #696, ISSA Member #339
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frnkeore Frequent Elocutionist Offline Posts: 7270 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: Design of reduced capacity cases. Reply #29 - Jan 5^th, 2014 at 7:31pm	Print Post
	picture

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