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Campfire Oracle
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Campfire Oracle
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Ok. Good luck,Rev.
Life Member SCI Life Member DSC Member New Mexico Shooting Sports Association
Take your responsibilities seriously, never yourself-Ken Howell Proper bullet placement + sufficient penetration = quick, clean kill. Finn Aagard
Ken
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OP
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Besides, in this day and age I think we expect more. Maybe that's unreasonable and we've just been spoiled, but I think our expectations have changed as well.
"An archer sees how far he can be from a target and still hit it, a bowhunter sees how close he can get before he shoots." It is certainly easy to use that same line of thinking with firearms. -- Unknown
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Thanks. We'll see what happens. It's not like it's the only one I have.
"An archer sees how far he can be from a target and still hit it, a bowhunter sees how close he can get before he shoots." It is certainly easy to use that same line of thinking with firearms. -- Unknown
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Campfire Oracle
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Campfire Oracle
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A 1.5" group will suffice for a lot of big game hunting. For varmints,not so much.
Life Member SCI Life Member DSC Member New Mexico Shooting Sports Association
Take your responsibilities seriously, never yourself-Ken Howell Proper bullet placement + sufficient penetration = quick, clean kill. Finn Aagard
Ken
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Campfire Oracle
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Campfire Oracle
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I'll trade you,your 7x57 load developing for my .460 Wby load developing.
Life Member SCI Life Member DSC Member New Mexico Shooting Sports Association
Take your responsibilities seriously, never yourself-Ken Howell Proper bullet placement + sufficient penetration = quick, clean kill. Finn Aagard
Ken
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We'd be settling for a 12 inch "group"!
"An archer sees how far he can be from a target and still hit it, a bowhunter sees how close he can get before he shoots." It is certainly easy to use that same line of thinking with firearms. -- Unknown
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Campfire Oracle
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Campfire Oracle
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Rev,put enough lead in the air you're bound to hit something.
Life Member SCI Life Member DSC Member New Mexico Shooting Sports Association
Take your responsibilities seriously, never yourself-Ken Howell Proper bullet placement + sufficient penetration = quick, clean kill. Finn Aagard
Ken
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Update:
I picked up a new iGaging Origin (digital), attached the comparator, and zeroed it out. Here are the averages of five measurements, from base to where the ojive meets the lands in a BACO Featherweight 7x57:
Nosler 140-grain Partition: 2.5755" Nosler 150-grain Partition: 2.5770" Nosler 160-grain Partition: 2.5785"
From this it looks like the OAL distance, from base to lands, using the ogive as the measuring point, changes .0015 inches between each successive weight. This will be helpful when working up a load for this particular rifle. A couple of my others aren't so picky, but this one seems to be.
BTW, I know JB and others have said Partitions really like a kick in the pants as far as accuracy is concerned, but for those who use them, what have you found with regards to the jump. Close to the lands? Or do they like a little jump?
Thanks for your patience.
RM Rev - for starters, are the measurements above for cartridges seated to touch the lands? If you're measuring the bullet ogive at the same place it contacts the lands (especially among similar bullet nose profiles), then of course the loaded cartridge base to ogive length will be similar for all of them, because they're all matched to the same fixed distance (the rifle's chamber). Finding one that varied a lot from the others would be cause to investigate why. If you're loading them to the same OAL and then finding similar base to ogive (BTO) measurements, that's a different thing that would indicate the bullet noses are similar length and profile. To check, measure the tip to ogive (TTO) distance for each of those three bullets; that's what affects distance to the lands compared to OAL between different bullets. If those three bullets have similar TTO measurements, it means by some coincidence that family of bullets probably uses similar or even identical nose profiles.
Last edited by Yondering; 06/14/19.
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Campfire Ranger
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Campfire Ranger
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Rev - for starters, are the measurements above for cartridges seated to touch the lands? If you're measuring the bullet ogive at the same place it contacts the lands (especially among similar bullet nose profiles), then of course the loaded cartridge base to ogive length will be similar for all of them, because they're all matched to the same fixed distance (the rifle's chamber). Finding one that varied a lot from the others would be cause to investigate why.
If you're loading them to the same OAL and then finding similar base to ogive (BTO) measurements, that's a different thing that would indicate the bullet noses are similar length and profile. To check, measure the tip to ogive (TTO) distance for each of those three bullets; that's what affects distance to the lands compared to OAL between different bullets. If those three bullets have similar TTO measurements, it means by some coincidence that family of bullets probably uses similar or even identical nose profiles.
Good post.
It is irrelevant what you think. What matters is the TRUTH.
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Much appreciated. Thanks ]
Rev - for starters, are the measurements above for cartridges seated to touch the lands? If you're measuring the bullet ogive at the same place it contacts the lands (especially among similar bullet nose profiles), then of course the loaded cartridge base to ogive length will be similar for all of them, because they're all matched to the same fixed distance (the rifle's chamber). Finding one that varied a lot from the others would be cause to investigate why. From base to touching the lands, shouldn't they all be the same length regardless of bullet weight and design? RM
"An archer sees how far he can be from a target and still hit it, a bowhunter sees how close he can get before he shoots." It is certainly easy to use that same line of thinking with firearms. -- Unknown
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I would work up loads with the Sierras to establish base line accuracy. Hate to admit agreeing with stick but you could drive yourself nuts trying to get the best accuracy from partitions. I do like the bullets but quit anytime I am close to or under and inch. Far cheaper and easier to get accuracy with the Sierras. Also a faster powder has turned things around for me with Partitions, I think JB recommended this or even the Nosler staff. Like most 100 year old cartridges the chamber dimensions vary greatly. Even with the similar ogive profile it will likely have wildly different seating depths for the different rifles. Good Luck.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
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BWA guys may help here. Ask for HOOK here. He might be able to help you. Be Well. Rusty
Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy. Its inherent virtue is the equal sharing of misery. Winston Churchill.
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Campfire Outfitter
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Excuse my ignorance but explain BWA.
Ed
A person who asks a question is a fool for 5 minutes the person who never asks is a fool forever.
The worst slaves are those that put the chains on themselves.
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I would work up loads with the Sierras to establish base line accuracy. That is the plan. I have several different powders to try, beginning with the old standby, 4350. Once I get a baseline - if I get a baseline - I'll go to work with some different powders and bullets and try to put together some hunting loads.
"An archer sees how far he can be from a target and still hit it, a bowhunter sees how close he can get before he shoots." It is certainly easy to use that same line of thinking with firearms. -- Unknown
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