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Post by hunter01 on Jan 30, 2024 21:26:29 GMT -5
That can run 200gr 357 mag h110 at 1500 and give me the pressure please?
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Post by bigbore5 on Jan 30, 2024 21:56:33 GMT -5
That can run 200gr 357 mag h110 at 1500 and give me the pressure please? What's the bullet length and your oal loaded? |
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Odin
.327 Meteor
Posts: 971
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Post by Odin on Jan 30, 2024 21:56:44 GMT -5
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Post by hunter01 on Jan 30, 2024 22:09:52 GMT -5
That can run 200gr 357 mag h110 at 1500 and give me the pressure please? What's the bullet length and your oal loaded? Im not sure on the length off hand but oal is 1.810 |
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Post by zeus on Jan 30, 2024 22:18:23 GMT -5
I can tell you that a 180 at 1615 means you don’t have to pick up brass anymore. They were pretty much one shot and toss.
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Post by bradshaw on Jan 30, 2024 22:18:30 GMT -5
That can run 200gr 357 mag h110 at 1500 and give me the pressure please? ***** Recommend a call to Hodgdon tech, provide your complete load data, with revolver with barrel length, which you expect 1,500 fps, for a rude awakening. After, please report back. David Bradshaw |
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Post by bigbore5 on Jan 30, 2024 22:23:47 GMT -5
59,800. Don't try it in.
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Post by bigbore5 on Jan 30, 2024 22:25:32 GMT -5
And that's a minimum pressure. Running it with an RCBS bullet, I get 64,800. I'm using the GRT program
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Post by hunter01 on Jan 30, 2024 22:37:07 GMT -5
And that's a minimum pressure. Running it with an RCBS bullet, I get 64,800. I'm using the GRT program Even at 65k, there is a safety margin in the cylinder MUCH greater than that of the 454. Nobody cares when someone is looking to hotrod the .454 but someone looking to push the .357 hard is in for a rude awakening? Ok. |
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Post by zeus on Jan 30, 2024 22:45:48 GMT -5
And that's a minimum pressure. Running it with an RCBS bullet, I get 64,800. I'm using the GRT program Even at 65k, there is a safety margin in the cylinder MUCH greater than that of the 454. Nobody cares when someone is looking to hotrod the .454 but someone looking to push the .357 hard is in for a rude awakening? Ok. If we are talking a FA, that’s what I used. I never went higher than 180. 110 can act funny compressed at those levels and can start to push the bullet back out of the case. It was fun to play with it but I found it a waste personally. The brass lasting one shot told me a lot. But, a 180 at 1615 was insanely accurate from my gun and it killed deer where they stood. Fun fun to shoot. |
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Post by hunter01 on Jan 30, 2024 22:47:56 GMT -5
Even at 65k, there is a safety margin in the cylinder MUCH greater than that of the 454. Nobody cares when someone is looking to hotrod the .454 but someone looking to push the .357 hard is in for a rude awakening? Ok. If we are talking a FA, that’s what I used. I never went higher than 180. 110 can act funny compressed at those levels and can start to push the bullet back out of the case. It was fun to play with it but I found it a waste personally. The brass lasting one shot told me a lot. But, a 180 at 1615 was insanely accurate from my gun and it killed deer where they stood. Fun fun to shoot. Yes, im talking about a large frame large cylinder gun capable of handling the pressures making only the brass and primer a concern. |
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Post by bigbore5 on Jan 31, 2024 0:00:43 GMT -5
I really hot rodded the 357 when I first got my 353. I quickly stopped using H110 due to the funny way it behaved under compression.
Mr. Taffin's article on the FA 353 is a very informative article and lists the types of loads you are looking for. He, like myself, used #9 powder to help the issue with load compression. The heavier the load is compressed, the funnier it can behave. And that's not the amusing kind of funny.
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Post by hunter01 on Jan 31, 2024 8:45:52 GMT -5
I really hot rodded the 357 when I first got my 353. I quickly stopped using H110 due to the funny way it behaved under compression. Mr. Taffin's article on the FA 353 is a very informative article and lists the types of loads you are looking for. He, like myself, used #9 powder to help the issue with load compression. The heavier the load is compressed, the funnier it can behave. And that's not the amusing kind of funny. Ive read his 353 article several times but he never mentioned pressure data other than it probably being very high. If i go above 16gr of 820, extraction is far too sticky to deal with. This lot of 820 is closer to h110 than #9. I was just curious as to actual pressures more than anything. Ill run some through the chrono at 16gr and see where im actually at. |
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Post by bradshaw on Jan 31, 2024 20:57:56 GMT -5
”... just curious as to actual pressures more than anything. Ill run some through the chrono at 16gr and see where im actually at. ***** A load of 60,000 psi jumps to 84,000 psi when proofed 40% over. Proofed at 50% over, pressure jumps to 90,000 psi. All abstract, of course, unless you can visualize what this does to materials.According to Bill Ruger, Jr., the piezo freaks out around 90,000 psi. What pressure range is acceptable for your top load? While we’re at it, why not simultaneously target these loads @ 100 yards? David Bradshaw |
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Post by lar4570 on Feb 1, 2024 12:30:01 GMT -5
Running Quickload with the NOE 200RN .861" loaded to 1.810" 7" barrel
17.8gns of H110 1.6% compressed load shows 1509fps @ 51kpsi.
Bullet length and loaded length plays a huge part in the pressures. So the above is just a big guess.
John Linebaugh told me that when they were doing pressure tests on the 475 that there came a point when compressing more H110 gave less velocity. He said that the Hornady Ballistics guy told him that with the Heavily commpressed H110 that it made the powder burn slower and that's why the velocities started to level off and drop with increasing powder charges.
I don't know if this holds true with the 357mag or not, just something to look out for.
John also said that H110 had a pretty linear pressure curve up to around 60kpsi. So if you get a bigger jump in velocity than expected, you are probably running much higher pressures than expected.
Give us the actual bullet length, loaded length and barrel length and we can adjust the inputs to see where you might actually be.
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