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Fireforming still, 7mmx57 to AI |
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d4570 
.416 Rigby 
Joined: 27 January 2004 Location: United States Status: Offline Points: 9961 |
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 Topic: Fireforming still, 7mmx57 to AIPosted: 20 May 2024 at 16:12 |
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I got my hands on some Sierra Gamekings 160 gr for REAL cheap. and another 100 7mm Mauser once fired brass at again Real cheap price. We already fireformed 250 for the GD's Ruger Am, but what the heck why not another 100... She is shooting SSTs 140s and TTSX 140s both shoot under an inch and the TTSX shoot under a .5 most the time. Long story short when we where fire forming the first bunch we where using the sst, and ttsx both shot as good as they do after fireforming.
I'm hoping after fireforming the 160s shoot better. We got the barrel in 1x8 twist to shoot longer bullets. So far it's not looking good, maybe Hammers will do better. Here is a 4 shot group I just shot with the SST's .  Here is the work up 5 different powder chargers.   Edited by d4570 - 20 May 2024 at 16:19 |
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Wing master
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AKA StraightShooter Joined: 10 June 2003 Location: United States Status: Offline Points: 8029 |
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Posted: 20 May 2024 at 18:54 |
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I use more Sierra bullets than any other. I bet you will be able to find a load that will work. Maybe a different powder?
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I have always considered myself to be quite the bullshitter, But ocasionally it is nice to sit back and listen to a true professional......So, Carry on.
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BEAR
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Joined: 07 September 2013 Location: Appalachian Mtn Status: Offline Points: 14390 |
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Posted: 21 May 2024 at 07:37 |
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I load the 7x57. Just wondering how fast you are pushing those??? fps
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“ The IQ and the life expectancy of the average American recently passed each other in opposite directions.”
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d4570
.416 Rigby
Joined: 27 January 2004 Location: United States Status: Offline Points: 9961 |
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Posted: 21 May 2024 at 08:16 |
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I'm not sure on the Sierra, fairly slow I would bet.
The 140s are going around 2800 fps.
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BEAR
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Posted: 21 May 2024 at 09:35 |
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2800 is pretty fast. I get that with P+ loads in my ruger #1, and that is book max load.
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“ The IQ and the life expectancy of the average American recently passed each other in opposite directions.”
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d4570
.416 Rigby
Joined: 27 January 2004 Location: United States Status: Offline Points: 9961 |
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Posted: 21 May 2024 at 13:16 |
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It could be a bit less but remember She has extra case capacity.
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Remember: Four boxes keep us free ,the soap box, the ballot box, the jury box, AND the cartridge box
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BEAR
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Posted: 21 May 2024 at 13:22 |
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Most 7x57 published loads are 45,000 or less on pressure due to old mausers.
Seems to be no reason not to go higher in a strong action, that is why Hodgdon publishes higher load for Ruger #1 actions. Mine has plenty of power for even the biggest whitetail
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“ The IQ and the life expectancy of the average American recently passed each other in opposite directions.”
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Wing master
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Posted: 21 May 2024 at 17:36 |
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Does anyone publish loads for 7X57 in modern actions?
I load a lot of 6.5X55 and they have different load data for what they call 6.5X55 SE. I don't know what SE stands for but the loads are for modern actions.
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I have always considered myself to be quite the bullshitter, But ocasionally it is nice to sit back and listen to a true professional......So, Carry on.
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d4570
.416 Rigby
Joined: 27 January 2004 Location: United States Status: Offline Points: 9961 |
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Posted: 21 May 2024 at 18:51 |
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I have not seen any said to be for Modern guns.
We used 7mm 08 info and just run till we saw slight presser sign, and backed off a titch.
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Remember: Four boxes keep us free ,the soap box, the ballot box, the jury box, AND the cartridge box
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BEAR
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Posted: 22 May 2024 at 09:27 |
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The Hogdon manuals show high performance P+ loads for 7x57 marked as "For ruger #1 only"
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“ The IQ and the life expectancy of the average American recently passed each other in opposite directions.”
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