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Joined: Jun 2011
Posts: 10,837
Campfire Outfitter
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Campfire Outfitter
Joined: Jun 2011
Posts: 10,837 |
I started at 70 grains and ended at 73. I thought 70 would be a good place to start as I was using 77 grains with my last barrel.
Shows the difference between a worn out throat and a brand new chamber in regards to pressure with the same lot of powder.
The people wringing their hands over Trump's rhetoric don't know what time it is in America.
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Joined: Aug 2007
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Campfire Sage
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Campfire Sage
Joined: Aug 2007
Posts: 115,424 |
I don't think that will happen to any cartridge that happens to have its best accuracy a grain of 2 short of book max. In fact with the .300 WM ladder I posted, book max was around 74 grains showing a velocity at 2700 or less. I hit pressure at 72.5 grains with a velocity of 2825 and good accuracy just a bit lower. Wind drift difference between the two velocities is 2" at 600 yards.
Check that. It's possible to turn a 26 Nosler into a Creedmoor with Blue Dot!
LOL! I was just exaggerating to be an ass hole. Travis
Trump being classless,tasteless and clueless as usual. Sorry, trump is a no tax payin pile of shiit. My young wife decided to play the field and had moved several dudes into my house
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Joined: Aug 2012
Posts: 85
Campfire Greenhorn
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Campfire Greenhorn
Joined: Aug 2012
Posts: 85 |
I don't know if anyone looked closely enough at the load data in the picture. it states a window from 73-76 grains of rl 33. I looked up the 6.5slr cartridge and I am hoping the OP just wrote the wrong numbers and is not trying to fit that amount if powder into a cartridge with 55grains of water capacity.
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Joined: Jun 2006
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2006
Posts: 46,038 |
A wise man is frequently humbled.
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Joined: Aug 2012
Posts: 85
Campfire Greenhorn
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Campfire Greenhorn
Joined: Aug 2012
Posts: 85 |
you have a link I would like to check it out.
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Joined: Dec 2002
Posts: 15,860
Campfire Ranger
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Campfire Ranger
Joined: Dec 2002
Posts: 15,860 |
It's Rich's wet dream. 300 ultramag case necked down.
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Joined: Jun 2006
Posts: 46,038
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2006
Posts: 46,038 |
you have a link I would like to check it out. No, but I think the specs are written on an index card, stored in a mayonnaise jar under Funk & Wagnall's porch.
A wise man is frequently humbled.
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Joined: Nov 2003
Posts: 28,859
Campfire Ranger
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OP
Campfire Ranger
Joined: Nov 2003
Posts: 28,859 |
85grNBTat3500FPS, I don't know if anyone looked closely enough at the load data in the picture. it states a window from 73-76 grains of rl 33. I looked up the 6.5slr cartridge and I am hoping the OP just wrote the wrong numbers and is not trying to fit that amount if powder into a cartridge with 55grains of water capacity. You could use some logic and realize the 6.5 slr could not push a bullet that weight that fast. Then you might ask a question like, "What is a 6.5 SLR?" Then I could tell you it is a 9.3X64 Brenneke necked to 6.5 with the shoulder blown out and some Weatherby radii added for beauty. The neck is about .300". The base is nominally .500". Once I had a fired case I discovered it holds 83.4 grains of water. That is very close to a .264 Win Mag. I think this wildcat is number fourteen for me. The "SLR" stands for Sue Loves Rich and doesn't hassle him about his wildcats. Dave Manson of Precision Reamers name this one. The one after this is a 7RUM necked down to 6.5 with the shoulder pushed back about .100". It holds 109 grains of water. Ben at Hornady named it "6.5RUMLN. I hope that clarifies things. P.S. All the links are here on 24hourcampfire.com
"Only Christ is the fullness of God's revelation." Everyday Hunter
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Joined: Feb 2008
Posts: 2,704
Campfire Regular
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Campfire Regular
Joined: Feb 2008
Posts: 2,704 |
Maybe didn't let the barrel cool down between ?
Lowcountry Wildlife Management Knowing Wildlife Beyond Science [email protected]Genesis 9;2
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Joined: Nov 2003
Posts: 28,859
Campfire Ranger
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OP
Campfire Ranger
Joined: Nov 2003
Posts: 28,859 |
Strick9,
That test took two hours to complete. I believe the barrel is shot out. I ordered another yesterday when my shooting took four hours.
"Only Christ is the fullness of God's revelation." Everyday Hunter
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Joined: Feb 2008
Posts: 2,704
Campfire Regular
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Campfire Regular
Joined: Feb 2008
Posts: 2,704 |
I hear ya Ringer. I saw some of your other ladders and they certainly pointed to some good nodes brother. I have had those days myself when no matter what I do , the node just won't peek out and smile.. What mfg tube are you going with?
Lowcountry Wildlife Management Knowing Wildlife Beyond Science [email protected]Genesis 9;2
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Joined: Nov 2003
Posts: 28,859
Campfire Ranger
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OP
Campfire Ranger
Joined: Nov 2003
Posts: 28,859 |
That tube is a worn out Pac-Nor. I ordered a new one yesterday while at the range. They told me it is ten weeks out so I will take this rifle to them since "I'm in line" now with the 50% deposit for them to chamber and install it on my action. The quote is $650 including threading it for a brake.
"Only Christ is the fullness of God's revelation." Everyday Hunter
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Joined: Jun 2004
Posts: 44,832
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,832 |
Strick9,
That test took two hours to complete. I believe the barrel is shot out. I ordered another yesterday when my shooting took four hours. Round count?
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Joined: Jan 2008
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Campfire Ranger
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Campfire Ranger
Joined: Jan 2008
Posts: 17,312 |
Strick9,
That test took two hours to complete. I believe the barrel is shot out. I ordered another yesterday when my shooting took four hours. Round count? Somewhere north of 20 and south of 27.
Screw you! I'm voting for Trump again!
Ecc 10:2 The heart of the wise inclines to the right, but that of a fool to the 24HCF.
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Joined: Dec 2002
Posts: 15,860
Campfire Ranger
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Campfire Ranger
Joined: Dec 2002
Posts: 15,860 |
That tube is a worn out Pac-Nor. I ordered a new one yesterday while at the range. They told me it is ten weeks out so I will take this rifle to them since "I'm in line" now with the 50% deposit for them to chamber and install it on my action. The quote is $650 including threading it for a brake. You could have had a Bartlein barrel shipped in to you ups 2nd day...
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Joined: Nov 2003
Posts: 28,859
Campfire Ranger
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OP
Campfire Ranger
Joined: Nov 2003
Posts: 28,859 |
mathman, Around a thousand.
"Only Christ is the fullness of God's revelation." Everyday Hunter
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Joined: Feb 2009
Posts: 290
Campfire Member
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Campfire Member
Joined: Feb 2009
Posts: 290 |
Nodes can get lost in the "noise" if you've got other stuff going on. I don't see what I would feel confident identifying as a node there. I would suggest the node lies in 2, 4 & 6 with 8 being on the same plain but outside the true node, maybe it was pulled. I would load .3gr increments from 4 through to 8 and re-test. I would not bother with 2, 5 or 7 in the next test string. Just load .3gr above and below 4, 6 and 8. Cheers. This is not how it works. Shots are consecutive as is the node. What? This test mirrors OCW testing, not ladder testing, when is the node consecutive? I must be doing it wrong!
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Joined: Nov 2003
Posts: 28,859
Campfire Ranger
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OP
Campfire Ranger
Joined: Nov 2003
Posts: 28,859 |
Today I started with #6 which is 75.5 grains and dropped .3 grains for four loads. 75.5 produced the best of the four groups. Tomorrow I will fire four groups with four different primers.
"Only Christ is the fullness of God's revelation." Everyday Hunter
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Joined: Jun 2012
Posts: 4
New Member
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New Member
Joined: Jun 2012
Posts: 4 |
Ringman, If you tell me what cartridge, bullet, powder and barrel length you are using I can give you an idea of where your node will be from internal ballistics. With the last barrel I bought I had a load done in 20 rounds. I can get your velocities off your original post.
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Joined: Feb 2002
Posts: 13,651
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2002
Posts: 13,651 |
mathman, Around a thousand. How many hunts has it been on in that time? Figure fewer than I would be happy with, but just curious.
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