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Bullet seating depth?

 
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  #1  
Old 01-20-2013, 02:48 PM
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Join Date: Dec 2011
Location: Shell, Wy
Posts: 34
Bullet seating depth?

So, I finally got around to working up some coyote/wolf loads for my .270. I'm going to try the 110 Vmax and a 90 gr Sierra hollow point.
I started with the Vmax, but when I seated the bullet to the length specified in the Hornady book (3.165") it's not even CLOSE to the cannelure. I was always under the impression that you seated the bullet to (or even over) the cannelure. What gives?
I then switched to load the 90 Sierra's. Although there's no cannelure to go by, when seated to what the Sierra book calls for (3.200"), it's only into the case by .172". Is that correct?
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  #2  
Old 01-20-2013, 06:13 PM
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Re: Bullet seating depth?

"Is that correct? "

All the different book OALs and cannalure/no cannalure varitations is enough to make a man think it's really not all that much a predetermined a thing to work towards, ain't it!
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Old 01-20-2013, 06:28 PM
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Re: Bullet seating depth?

I always try at least to seat a bullet OUT as far as I can and NOT touch rifling so I dont worry about sticking a slug in the barrel. I always keep " 1 caliber" of bullet in the next....EXAMPLE: 30 cal....I have a minimum of .3 in the neck being gripped. 22 cal..same deal..at least .22 of bullet in the casing neck.
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Old 01-21-2013, 08:29 PM
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Join Date: Dec 2011
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Re: Bullet seating depth?

Sorry guys, but I'm still confused. Does that mean that the book numbers are meaningless, then? Are they supposed to be just a starting point, or what? I would really have to wonder how straight those Sierra's are, only being in the case by .172"...
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Old 01-21-2013, 08:46 PM
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Join Date: Mar 2012
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Re: Bullet seating depth?

I am not 100% sure and maybe some one with more experiece here can chime in and correct me if I am wrong, but I always thought that the o.a.l listed in the manuals was what factory ammo was loaded at to make sure they would fit in all of the magazines, for all different makes of firearms, so if you have a rifle with a longer action you can lengthen the seating depth in your shell so that it is not touching the lands in your barrel correct me if I am wrong.
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Old 01-21-2013, 08:57 PM
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Re: Bullet seating depth?

The numbers you see in the manuals IMHO are reference, a starting point only. As fare as how deep in the neck should you go? Far enough to hold the bullet securely. The bullet your using is pretty short for cal, so any forces that may push the bullet of of alignment with the center of the case will have less leverage, than a heavier/longer bullet. While seating 1 cal deap is a good idea not all chamberings have a neck that is 1cal long, 2 of the standard long range chamberings have necks less than 1 cal in length.

So experiment with several cases with bullets seated a different depths, by trying to move the bullet side to side, when you find a depth that no longer allows you to move the bullet you can be pretty certain that, that bullet is held securely.
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Keep in mind the animals we shoot for food and display are not bullet proof. Contrary to popular belief, they bleed and die just like they did a hundred years ago. Being competent with a given rifle is far more important than impressive ballistics and poor shootability. High velocity misses never put a steak in the freezer.

Joe
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  #7  
Old 01-21-2013, 09:17 PM
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Join Date: Dec 2011
Location: Shell, Wy
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Re: Bullet seating depth?

Thanks for the help, guys!
The bullets seem to be held pretty firmly- no movement at all- but I wondered how straight the loaded round would be when it's barely in there....
I can't see any wobble when I roll them across the bench so I guess I'll give them a try.
I did get out and shot the Vmax's. I had one load that shot about 3/4" @ 100 yards. Not great, but for a first try and in a 30 year old Ruger with a 50 year old scope- I guess it's going in the right direction!
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