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Anybody with a Hornady manual? I need starting and top end load data with IMR 4350 powder for their .284 175 gr. Round Nose bullet for the 7x57 Mauser. Thanks.
Last edited by 43Shooter; 06/02/12.
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I don't know if the older manuals may have it, but my #8 doesn't list the 175 with IMR 4350. Hodgdon's site lists a starting load with the 175 Partition of 37.0 gns and max of 40.0 grns,. Should at least give you a starting point to work up a load: http://data.hodgdon.com/cartridge_load.asp
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My 7th edition doesn't list that combo either.
They list
AA2700 34.3 - 42.4
WIN 760 35.4 - 42.1
H414 35.3 - 42.5
AA4350 35.7 - 41.1
IMR4831 35.7 - 43.0
H4831 37.7 - 43.1
RL-19 38.6 - 46.4
IMR7828 39.8 - 47.4
Hope this can help.
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I couldn't find a hornady bullet listing but I found a speer and partition. they are relatively the same bullet so I would think they would be relatively the same since they are flat base bullets.
Speer #13 lists a 175 grand slam staring load of 41.0 grains @ 2214fps and a max of 45.0 grains @2433fps
Hodgen lists a 175 grain partition starting load of 37.0 grains @ 2076fps and a max of 40.0 grains @2231fps
Seems we constantly hear about how Social Security is going to run out of money but we never hear about welfare or food stamps running out of money. What's interesting is the first group WORKED for their money but the other group didn't.
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Take this for what it is worth. The data is from the Hornady 3rd ediition pg 182 Pub 1980
7x57 - 175gr RN - Fed 210 primer - Win case - 3.015" COL
IMR4350: 42.9 @ 2200 fps /44.3 @ 2300 fps
I must confess, I was born at a very early age. --Groucho Marx
Patriotism is supporting your country all the time and your government when they deserve it. --Mark Twain
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The 4th edition lists a starting charge of 42.9grs, and a max of 44.3grs of IMR4350 for a velocity of 2300FPS from a 22" barrel. The data was collected using Federal 210 primers.
Noslers #3 edition lists 41grs to start, and 45grs as max, with the velocity being 2520FPS.
Sierra's 3rd edition lists 41.2 to 45.2grs at 2550FPS.
One of the older Speer manuals lists 41 to 45grs max at 2433FPS.
All of this data is from older manuals, so I would recommend starting at the lower charges and working up, checking velocity along the way. I would also use one of the hand depriming tools to see at what level the primer pockets got loose, if at all. If the primers are easily removed by hand, its time to back it down for sure, by 5% at least.
"Give a lazy man the toughest job, and he will find the easiest way to do it"
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Take this for what it is worth. The data is from the Hornady 3rd ediition pg 182 Pub 1980
7x57 - 175gr RN - Fed 210 primer - Win case - 3.015" COL
IMR4350: 42.9 @ 2200 fps /44.3 @ 2300 fps
An also FWIW, if I plug it into Quickload, I get a max of about 45.0 grns....and that's giving about a 50k psi.
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Thanks to all. I'll be trying this in a 95 Mauser. According to the Lyman manual SAMMI rates the 93s & 95s as 46,000 cup actions so thought I'd be careful.
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Dropping to 43.0 in QL give me about 44k psi.
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Hornady volune 2 7 X 57 and a 175 Gr. bullet for IMR4350 says 41.0 starting load and 47.7 is maximum for 2600 fps. I would work to that top load with a litte caution.
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Thanks. I'm going to stop at the first load that gives me any kind of accuracy. I don't plan on going to max. This is an old rifle. I'll be using it with open sights at not much more than 100 yards so don't need a lot of velocity.
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Well, not Hornady's data, but here's what QuickLOAD shows. By it's prediction 43.5g of IMR 4350 should be a safe top-end load for a weak actioned Mauser. Of course, start 10% below that and watch for pressure signs. USE THIS DATA AT YOUR OWN RISK.Cartridge : 7 x 57 mm Mauser (SAAMI)
Bullet : .284, 175, Hornady RN 2855
Useable Case Capaci: 52.831 grain H2O = 3.430 cm�
Cartridge O.A.L. L6: 3.071 inch = 78.00 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 4350
Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.176% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !
Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms
-11.8 77 37.50 2114 1737 31252 7449 92.0 1.660
-10.6 78 38.00 2140 1780 32292 7567 92.5 1.638
-09.4 79 38.50 2166 1824 33365 7684 93.0 1.616
-08.2 81 39.00 2192 1868 34468 7799 93.6 1.595
-07.1 82 39.50 2218 1912 35600 7912 94.1 1.574
-05.9 83 40.00 2244 1957 36761 8023 94.5 1.554
-04.7 84 40.50 2270 2003 37953 8132 95.0 1.531
-03.5 85 41.00 2296 2049 39181 8239 95.4 1.508
-02.4 86 41.50 2322 2095 40447 8343 95.9 1.486
-01.2 87 42.00 2348 2142 41752 8445 96.3 1.464
+00.0 88 42.50 2374 2190 43098 8544 96.6 1.442
+01.2 89 43.00 2400 2238 44486 8641 97.0 1.421 ! Near Maximum !
+02.4 90 43.50 2425 2286 45918 8734 97.3 1.400 ! Near Maximum !
+03.5 91 44.00 2451 2334 47394 8826 97.7 1.380 ! Near Maximum !
+04.7 92 44.50 2477 2384 48917 8914 98.0 1.360 ! Near Maximum !
+05.9 93 45.00 2502 2433 50489 8999 98.2 1.340 !DANGEROUS LOAD-DO NOT USE!
Results caused by � 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba 88 42.50 2433 2301 46816 8589 98.6 1.390 ! Near Maximum !
Data for burning rate decreased by 5% relative to nominal value:
-Ba 88 42.50 2306 2067 39408 8404 93.8 1.501
“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.”
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I've found my chronograph to be invaluable working with the 7x57. Mine has a ridiculously long throat and generally gives velocities well beneath manual predictions (to the tune of 200-300 fps...). Actually, if I seat the Hornady 175 RN bullet to the middle of the crimp groove I still have a 0.100" (yes, 1 tenth of an inch) jump to the lands.
As a comparison it took me 47.0 grains of H4831sc to get to 2250 fps with a Hornady 175 spire point. That's well above Hornady's published data, and I am using a modern Ruger M77 action. Don't attempt that load blindly. I do not recommend playing with that load unless you have a chronograph, and do not mind working up from WAY below there.
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