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Shooter8 Rookie Member
Joined: Feb 27, 2009 Posts: 1
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Posted: Thu Feb 26, 2009 9:41 pm Post subject: .270-.30 Carbine case wildcat? |
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Sorry to bother you all with this trivial question(s)!
First can any there tell me what kind of max MV I could expect with this cartridge, shooting 73.3 grain FABRL bullets seated shallow in the case, protrusion only 0.2" into case, with a roll crimp in the canular in 16,18 and 20" BBLs? Also what powder and how much of it with chamber pressure of 40,000 PSI or less?
Second, do any of you know of an online internal balistics calculator where I might be able to answer this sort of question for myself?
Thank you for any help you can give, Sincerely, SFD.
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Pumpkinslinger Super Member
Joined: Sep 22, 2007 Posts: 5001 Location: NC foothills
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Posted: Thu Feb 26, 2009 11:42 pm Post subject: Re: .270-.30 Carbine case wildcat? |
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You can buy software to get you in the ballpark but I've never seen anything online, or free, that will do it.
_________________ Mike
"I ain't no better than anybody else, and there ain't nobody better than me!" Ma Kettle |
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gelandangan Super Member
Joined: May 07, 2006 Posts: 6396 Location: Sydney Australia
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Posted: Fri Feb 27, 2009 1:06 am Post subject: Re: .270-.30 Carbine case wildcat? |
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One of the software is called QuickLoad . Great stuff..
_________________ A straight line is the shortest distance between two points.
A smile is the shortest distance between two people.
Do - Not try!
gelandangan.weebly.com/ |
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PaulS Super Member
Joined: Feb 18, 2006 Posts: 4330 Location: South-Eastern Washington - the State
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Posted: Sat Feb 28, 2009 2:15 am Post subject: Re: .270-.30 Carbine case wildcat? |
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Your maximum muzzle velocity will be less than you can get with a similar weight 30 caliber bullet in the same case. If you are looking for an improvement in velocity or more penetration you are going to be disappointed.
_________________ Paul
__________________
Speer, Lyman, Hodgdon, Sierra, and Hornady = reliable loading data
So and So's pages on the internet = NOT reliable loading data
Always check data against manuals
NEVER exceed maximum listed loads |
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wncchester Member
Joined: Apr 08, 2006 Posts: 160
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Posted: Sat Feb 28, 2009 8:09 am Post subject: Re: .270-.30 Carbine case wildcat? |
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The old carbine is a pistol case and not a large one at that. It simply can't hold enough powder to make much difference no matter the bore you push it through. The .22 versions approximate a .22 Hornet and they may be the best conversion.
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