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Seating bullet depth

 
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  #1  
Old 02-21-2014, 09:29 PM
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Join Date: Jan 2014
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Seating bullet depth

I've got a question about bullet depth if someone could help me with. If i try to extend the bullet out of the neck far enough that i'm as close to the lands as I can get with out touching and far enough back off the lans that as soon as the bullets starts to move it has a little start time before it is forced into the lans where is the best place for the bullet as far as the bullet depth in the neck? What i'm trying to get at is that if i spend the time to get as close as i can to the rifle lans with the bullet but the bullet is just pressed enough into the neck to seat the bullet won't this cut down on consistent pressure build and release of the bullet?..So what would be better,.. if i had the bullet pressed into the neck just enough to keep the bullet in the neck but are very close to the lans without touching or is it better to have the bullet pressed into the neck of the case so the bottom of the bullet is even with the bottom of the neck to get a more consistent and better pressure build for bullet release?..I've been going for the as closest length as i could get to the rifle lans to prevent less bullet jump but now I'm stumped on which is more important or would add up to more accuracy? What got this stirring around in my peanut thick head is smaller bullets don't have the length as a heavier grain bullet therefore to achieve greatest bullet length I don't feel that i'm pressing the bullet down enough with smaller grain bullets to get the proper pressure build to get a good consistent bullet release... UUUHHHHH now what do I do??????????..Thanks for your time and help

baydog
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  #2  
Old 02-22-2014, 05:12 AM
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Location: clearfield county , Pa
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Re: Seating bullet depth

rule of thumb is , you need the bullet seated in the case the same amount as the bullet diameter .
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Old 02-22-2014, 11:52 AM
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Location: Mountians of SW NC, near Asheville
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Re: Seating bullet depth

"...where is the best place for the bullet as far as the bullet depth in the neck?"

NOTHING about reloading for accuracy is predictable and anyone saying otherwise has too little experience to listen to. Optimum seating depth is as variable as powder charges and both can only be learned by experimentation; there are no 'secret' short-cuts to accuracy.

Rules of thumb are best used to measure thumbs, some very good cartridges don't have necks a caliber long.
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  #4  
Old 02-22-2014, 12:08 PM
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Location: clearfield county , Pa
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Re: Seating bullet depth

so your saying a bullet seated in the case .010 is good ?WOW ha ha ha
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  #5  
Old 02-23-2014, 01:21 AM
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Re: Seating bullet depth

Quote:
Originally Posted by jimbires View Post
so your saying a bullet seated in the case .010 is good ?WOW ha ha ha


Try seating a bullet a caliber deep in a .300 Win Mag neck and get back to us. Then maybe you will see what boomtube was getting at. If you do a little research, you will find that the .300 Win Mag effectively blew your rule of thumb out of the water more than 50 years ago.
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  #6  
Old 02-23-2014, 01:27 AM
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Join Date: Dec 2009
Posts: 891
Re: Seating bullet depth

Quote:
Originally Posted by baydog View Post
I've got a question about bullet depth if someone could help me with. If i try to extend the bullet out of the neck far enough that i'm as close to the lands as I can get with out touching and far enough back off the lans that as soon as the bullets starts to move it has a little start time before it is forced into the lans where is the best place for the bullet as far as the bullet depth in the neck? What i'm trying to get at is that if i spend the time to get as close as i can to the rifle lans with the bullet but the bullet is just pressed enough into the neck to seat the bullet won't this cut down on consistent pressure build and release of the bullet?..So what would be better,.. if i had the bullet pressed into the neck just enough to keep the bullet in the neck but are very close to the lans without touching or is it better to have the bullet pressed into the neck of the case so the bottom of the bullet is even with the bottom of the neck to get a more consistent and better pressure build for bullet release?..I've been going for the as closest length as i could get to the rifle lans to prevent less bullet jump but now I'm stumped on which is more important or would add up to more accuracy? What got this stirring around in my peanut thick head is smaller bullets don't have the length as a heavier grain bullet therefore to achieve greatest bullet length I don't feel that i'm pressing the bullet down enough with smaller grain bullets to get the proper pressure build to get a good consistent bullet release... UUUHHHHH now what do I do??????????..Thanks for your time and help

baydog
My advice is not to get obsessed with seating your bullet to be in or near the rifling. Not one of my rifles has achieved its best accuracy in that fashion. Test for seating depth and let your rifle decide what is best. Here is a good place to start. This method works with just about any bullet:

Getting the Best Precision and Accuracy from Berger VLD bullets in Your Rifle
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  #7  
Old 02-23-2014, 06:20 AM
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Join Date: Mar 2008
Location: clearfield county , Pa
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Re: Seating bullet depth

Quote:
Originally Posted by baydog View Post
What got this stirring around in my peanut thick head is smaller bullets don't have the length as a heavier grain bullet therefore to achieve greatest bullet length I don't feel that i'm pressing the bullet down enough with smaller grain bullets to get the proper pressure build to get a good consistent bullet release... UUUHHHHH now what do I do??????????..Thanks for your time and help

baydog

baydog , what I'm picturing is you're working with a heavy per caliber grain bullet and have it close the the lands , with plenty of bullet pressed in the case . this long bullet could even be seated past the case neck shoulder junction . now you decide to switch to a considerably shorter light per caliber grain bullet . you can't have the same bullet jump and have the bullet seated in the brass case the same amount because , as you said , the bullet is shorter . so now you have to start somewhere . that's where I was coming from with the seating one caliber diameter of bullet into the brass case . or seat the bullet to the case neck shoulder junction . you have to get enough bullet seated into the case to help align the bullet and also to keep the bullet from falling out . Jim
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