.223 rem. bullet seating depth and lands question

p5200

Sergeant
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Minuteman
Jun 23, 2008
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poplar bluff mo.
Just trying to get a general, idea of where most people get their best accuracy at say, .005" off lands vs. .010-.030" off the lands or into the lands I realize, this will vary with individual guns. Thanks for sharing your experience!
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Re: .223 rem. bullet seating depth and lands question

I seem to always have the best luck with .010" off of the lands with lots of different rifles and different bullets. Most of time, whether you want to use the magazine or not will dictate where you seat your bullets.
 
Re: .223 rem. bullet seating depth and lands question

I have one rifle, a cz 527 in .223 it performes best with .010 off the lands. And my Savage model 12 LRPV likes it just at the lands. With some load deveopment you will find what your rifle likes. Powder charge and depth. It took me approx. 150-200 rounds to figure this out. Once I found the sweet spot both rifles shoot .15 - .2 pretty much all the time. At 100 yards of course. So with this said, load up 5 shells of each load and depth and go shoot.
 
Re: .223 rem. bullet seating depth and lands question

No one has mentioned the bullet being used. Brand or weight. I've found that sierras (80s) tend to tolerate varying amounts of jump and are not really picky. While VLDs will tend to be the finicky ones. Some JKLs that I have used want to be in the lands (up to .015), some work just off the lands or touching. I think it's really an individual bullet thing. Any mag length designed bullet should work well at just that. Mag length.
 
Re: .223 rem. bullet seating depth and lands question

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: echotango</div><div class="ubbcode-body">No one has mentioned the bullet being used. Brand or weight. I've found that sierras (80s) tend to tolerate varying amounts of jump and are not really picky. While VLDs will tend to be the finicky ones. Some JKLs that I have used want to be in the lands (up to .015), some work just off the lands or touching. I think it's really an individual bullet thing. Any mag length designed bullet should work well at just that. Mag length. </div></div> The rifle is a Savage 10fp in .223 rem. I'm starting with 25 grains of Varget, Hornady brass and Hornady V-Max 55 grn. bullets. I started with a few rounds around .005" from the lands. I'll try some more variations with seating and charge and see what works best. Sure is nice to have so much experienced help for us new, reloaders! Thanks!
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Re: .223 rem. bullet seating depth and lands question

Just be sure to watch the powder loads. Always start low and work your way up. And be sure to watch the pressure.

I always check my casses as well b-4 I start seating. Just to make sure every case is uniform with a powder charge.

What twist rate is your barrel?
My savage is a 1/9, so far I have found the hornady 68g v-max .010 off the lands shoot outstanding.
The Sierra 69g match I have them .005 off and they shoot just as good.
 
Re: .223 rem. bullet seating depth and lands question

Each rifle of mine likes a different jump setting depending upon the bullet, length of bullet, & twist rate of barrel

22-250 1 in 12 twist
52gr SMK
.010" jump
55gr vmax & 55gr NBT.002" jump
26" bbl

223 1 in 12 twist
50gr v-max, 55gr v-max, & 55gr NBT, & 50gr NBT
All set @ .002" jump
26" bbl

223 1 in 9 twist
.002" jump on 68gr hornady match
20" bbl
 
Re: .223 rem. bullet seating depth and lands question

"..(do) most people get their best accuracy at say, .005" off lands vs. .010-.030" off the lands or into the lands.."

Yeah. And I think that's about as specific as we can honestly get.
 
Re: .223 rem. bullet seating depth and lands question

All rifles are diffrent. The best thing one can do is load up, say 12 rounds, all seated to diffrent depths. Start by taking a measurement with your COAL guage, then seat 3 .005 off then three .010 and so on, find the one it likes then play with powder charges. Thats how I did my rifles.

It takes some range time. You might get a little agravated, but hey, you are getting range time.