Hornady manuals give excellent load data for the 30-30.I use Olin 748 but work up to these loads.Sam Fadala wrote a book 'The 30-30 and the Winchester 94". It has reasonable load data and deals what the 30-30 factory ammo is capeable of doing. Byron
my Win 1885 clone 30-30,
Ayup......oof, that's an old thread
Remo-99
Quote:
The 270 is SAAMI registered at 65,000 psi max average pressure.
The 30-30 case is WAY stronger than the 270 case.
Sorry Clark, I must respetively disagree with you on that one.
CAUTION: The following post includes loading data beyond currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The High Road, nor the staff of THR assume any liability for any damage or injury resulting from use of this information.
1 in 12" twist
26" long.
7 pound rifle
220 gr HNDY round nose moly W748 2.92" 26" barrel, 30-30, Sav 219L
Quickload prediction:
33 gr 51 kpsi 2176 fps
34 gr 56 kpsi 2232 fps
35 gr 62 kpsi 2287 fps
36 gr 68 kpsi 2340 fps
37 gr 75 kpsi 2394 fps
38 gr 83 kpsi 2446 fps brass and primer still look good
39 gr 92 kpsi 2498 fps primer very cratered, case full of powder, ball powder compresses a hair below 2.92"
39 gr 92 kpsi 2498 fps primer very cratered, case full of powder, ball powder compresses a hair below 2.92"
1) .270Win Howa, 22" barrel, 13x40x40 Vari-iii scope 130 gr 1.125" PSP moly bullets, seated long, 3.34", surplus Bulk IMR4895 that burns like H322
51 gr 3093 fps .015" extractor groove growth, primer fell out, gun jammed, 10 minutes to pound bolt open [Quickload predicts 3152fps, 76kpsi ]
If you buy ANYTHING designed in 1894, you better be prepared to accept it and learn to deal with it on its own terms.
In this world we have come to expect that all our products will protect us automatically, we only pick it up and use it with no special knowledge or effort. If that's your desire, buy a modern rifle with all the safety features built in.
But if you buy an 1894 design, you better be prepared to accept it and learn to handle it safely.
krochus
Clark was your "data" produced using a 30-30 that fully supports the case as with a break action single shot?
If so was your comparative 270 measurments made in the same type chamber?
If not then your "data" is simply not valid and is just another apples to oranges comparison by someone without access to real ballistics testing equipment.
Sweet's von Mises calculations
July 16, 2010 06:10 AM
Kernel Clark,
Quote:
Sweet's von Mises calculations
Have not heard of this technique. Can you elaborate on those calculations, or provide a link. Google turned up nothing. I would be interested in understanding the math.
ASS_CLOWN
one of us
Posted 22 June 2004 07:43
Clark,
Here are the results of the von Mises stress calculations for the 223 Remington case head.
Using mechanical properties for C26000 brass (cartridge brass)
Temper - H06
Tensile yield strength - 65,300 psi
von Mises stress at the Primer pocket surface - 117,186 psi
von Mises stress at the Extractor OD - 65,300 psi (initiation of yielding)
Chamber pressure - 86,427 psi (Nominal properties)
Chamber pressure - 80,809 psi (minimum properties)
Chamber pressure - 92,044 psi (maximum properties)
Again these values are ONLY valid for a H06 tempered C26000 case.
ASS_CLOWN
PS
The Mauser case head nominal condition chamber pressure for the initiation of case head yielding with H06 C26000 brass is: 76,977 psi
The H&H magnum case head nominal condition chamber pressure for the initiation of case head yielding with H06 C26000 brass is: 79,597 psi
The Rem Utra magnum case head nominal condition chamber pressure for the initiation of case head yielding with H06 C26000 brass is: 83,950 psi
The H&H magnum case head nominal condition chamber pressure for the initiation of case head yielding with H06 C26000 brass is: 79,597 psi
The 460 Weatherby magnum case head nominal condition chamber pressure for the initiation of case head yielding with H06 C26000 brass is: 89,987 psi
The Rigby case head nominal condition chamber pressure for the initiation of case head yielding with H06 C26000 brass is: 90,450 psi
The 7.62X39 Soviet case head nominal condition chamber pressure for the initiation of case head yielding with H06 C26000 brass AND LARGE RIFLE PRIMER is: 66,769 psi
The 7.62X39 Soviet case head nominal condition chamber pressure for the initiation of case head yielding with H06 C26000 brass AND SMALL RIFLE PRIMER is: 81,609 psi
The geometric and mechanical property tolerances for the C26000 H06 material and "estimated" case tolerancing provide for a +/- 7% value from the nominals I posted above.