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Joined: Jul 2015
Posts: 1,188
Campfire Regular
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Campfire Regular
Joined: Jul 2015
Posts: 1,188 |
Stick a bullet in a case that will accept it but allow you to pull it out with your fingers. There are several ways to achieve this. Run it into your chamber and jam it home with your bolt. If the neck tension is too tight you may extract a case without a bullet, so be aware of that. Remove cartridge from gun. Measure it. Back your seater off an eighth of a turn and roll with it. It'll be close. If you have a micrometer on your die, there you go. BTW, your powder charge will dictate your load far more than your seating depth. Get it within a few hundredths of the lands and drop the hammer. Then you skosh it one way or the other. Don't get too caught up with all that jazz. Pretty sure he has this under control. Sounds like the paper clip was the problem.
TB, CWD and Covid-19 , free so far.....
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Joined: Dec 2022
Posts: 2,325
Campfire Regular
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Campfire Regular
Joined: Dec 2022
Posts: 2,325 |
Stick a bullet in a case that will accept it but allow you to pull it out with your fingers. There are several ways to achieve this. Run it into your chamber and jam it home with your bolt. If the neck tension is too tight you may extract a case without a bullet, so be aware of that. Remove cartridge from gun. Measure it. Back your seater off an eighth of a turn and roll with it. It'll be close. If you have a micrometer on your die, there you go. BTW, your powder charge will dictate your load far more than your seating depth. Get it within a few hundredths of the lands and drop the hammer. Then you skosh it one way or the other. Don't get too caught up with all that jazz. Pretty sure he has this under control. Sounds like the paper clip was the problem. Totally read right over the paper clip deal. My bad. How the heck did it make its way in there? Must be a pretty loose fitting stock or wide barrel channel. Idk
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Joined: Nov 2007
Posts: 8,457 Likes: 2
Campfire Outfitter
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Campfire Outfitter
Joined: Nov 2007
Posts: 8,457 Likes: 2 |
It’s always a good idea to verify distance to lands with a new lot of bullets. I need to clarify I think: it is not the lands, not distance to the lands. These bullets are making full diameter contact in the unrifled part of the throat cartridge-ward of the rifling. We're not talking about a short throat situation. We spun a 6.5mm throater in the chamber, didn't help. With a bore scope we could see just the slightest marks where the throater bumped but it wasn't enough to change diameter any. So far as OAL, last night I loaded some ammo so I have some numbers to work with. With the 130 grain ELD match bullets, standard 2.950" worked fine. With the 143 grain ELD X bullets I had to seat them to 2.850 and they still make full diameter contact for the first 1/8th inch forward of the chamber. It's not hard contact, but is is contact. Then with the 147 grain ELD match, at 2.875" OAL I stopped seeing full diameter contact. Final, only marginally related, data point .. with the 156 grain Berger, I had clearance / no contact at 3.000 OAL. That's basically the longest that will feed through my rifle's magazine. Tom
Anyone who thinks there's two sides to everything hasn't met a M�bius strip.
Here be dragons ...
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Joined: Jun 2004
Posts: 44,856 Likes: 3
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,856 Likes: 3 |
Have you checked the diameter of those bullets with a good micrometer? I have run into Lake City Match ammunition with .309" bullets. Maybe you have a similar situation.
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Joined: Nov 2007
Posts: 8,457 Likes: 2
Campfire Outfitter
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Campfire Outfitter
Joined: Nov 2007
Posts: 8,457 Likes: 2 |
Good question .. no, I assumed (we know 'bout that :)) that the problem was that the ogive was "fat", not the the entire bullet. I will check it tonight.
Anyone who thinks there's two sides to everything hasn't met a M�bius strip.
Here be dragons ...
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Joined: Nov 2007
Posts: 8,457 Likes: 2
Campfire Outfitter
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Campfire Outfitter
Joined: Nov 2007
Posts: 8,457 Likes: 2 |
I can't detect a difference with my micrometer, 0.264" for all 3 bullets.
Anyone who thinks there's two sides to everything hasn't met a M�bius strip.
Here be dragons ...
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Joined: Jul 2015
Posts: 1,188
Campfire Regular
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Campfire Regular
Joined: Jul 2015
Posts: 1,188 |
Stick a bullet in a case that will accept it but allow you to pull it out with your fingers. There are several ways to achieve this. Run it into your chamber and jam it home with your bolt. If the neck tension is too tight you may extract a case without a bullet, so be aware of that. Remove cartridge from gun. Measure it. Back your seater off an eighth of a turn and roll with it. It'll be close. If you have a micrometer on your die, there you go. BTW, your powder charge will dictate your load far more than your seating depth. Get it within a few hundredths of the lands and drop the hammer. Then you skosh it one way or the other. Don't get too caught up with all that jazz. Pretty sure he has this under control. Sounds like the paper clip was the problem. Totally read right over the paper clip deal. My bad. How the heck did it make its way in there? Must be a pretty loose fitting stock or wide barrel channel. Idk I figured you had missed that part. laffn....
TB, CWD and Covid-19 , free so far.....
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