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Barnes TTSX 223 seating depth #2113906
05/14/17 06:13 AM
05/14/17 06:13 AM
Joined: Feb 2013
Posts: 7,410
Owens Cross Roads
Rocket62 Offline OP
14 point
Rocket62  Offline OP
14 point
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Owens Cross Roads
Working up a load for Barnes TTSX 62g in 223 for a DPMS AR15

Barnes load data states a COAL of 2.25 and recommends 0.05 off the lands so in theory I'd start with 2.25 - 0.05 = 2.2" COAL

Using a gauge I measure 2.392 base to end of plastic tip which is a mile longer. Just for fun I measured base to junction of copper and plastic tip and found it to be 2.255 ... almost the same as the Barnes load data.

I'm thinking I need to start at 2.392 - 0.05 = 2.342 COAL for starters or maybe even 0.08 off the lands which would be 2.392 - 0.08 = 2.312 COAL

Insights? Are guaged COAL's on various guns going to differ that much or am I missing something?


Originally Posted by Rocket62
Just curious, are you just blowing off steam or did you really threaten me?
Re: Barnes TTSX 223 seating depth [Re: Rocket62] #2114230
05/14/17 03:45 PM
05/14/17 03:45 PM
Joined: Sep 2007
Posts: 4,645
Flint City, AL
trlrdrdave Offline
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trlrdrdave  Offline
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Since it's magazine fed don't you stick to COAL and not worry about distance off the lands?


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Re: Barnes TTSX 223 seating depth [Re: Rocket62] #2114260
05/14/17 04:12 PM
05/14/17 04:12 PM
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Reloader79 Offline
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I believe that 2.240" is as long as you can go with the ar15 mags, anything longer won't feed into it.


If I agreed with you, we'd both be wrong.

Bluetick serpentines around green fields and rock spit a lease
Re: Barnes TTSX 223 seating depth [Re: Rocket62] #2114797
05/15/17 10:15 AM
05/15/17 10:15 AM
Joined: May 2012
Posts: 7,832
Pike County, AL
Fuzzy_Bunny Offline
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Originally Posted By: Rocket62
Working up a load for Barnes TTSX 62g in 223 for a DPMS AR15

Barnes load data states a COAL of 2.25 and recommends 0.05 off the lands so in theory I'd start with 2.25 - 0.05 = 2.2" COAL



You theory is wrong. You may be limited by magazine length, but you have to measure the col required for the bullet you are using to touch the lands. There are several different methods you can use to do this. Freebore and bullet shape varies and is not a constant.

Re: Barnes TTSX 223 seating depth [Re: Fuzzy_Bunny] #2114799
05/15/17 10:17 AM
05/15/17 10:17 AM
Joined: Feb 2013
Posts: 7,410
Owens Cross Roads
Rocket62 Offline OP
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Rocket62  Offline OP
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Owens Cross Roads
Originally Posted By: Fuzzy_Bunny
Originally Posted By: Rocket62
Working up a load for Barnes TTSX 62g in 223 for a DPMS AR15

Barnes load data states a COAL of 2.25 and recommends 0.05 off the lands so in theory I'd start with 2.25 - 0.05 = 2.2" COAL



You theory is wrong. You may be limited by magazine length, but you have to measure the col required for the bullet you are using to touch the lands. There are several different methods you can use to do this. Freebore and bullet shape varies and is not a constant.


Did I not do that with the Hornady OAL guage?


Originally Posted by Rocket62
Just curious, are you just blowing off steam or did you really threaten me?
Re: Barnes TTSX 223 seating depth [Re: Rocket62] #2114802
05/15/17 10:19 AM
05/15/17 10:19 AM
Joined: May 2012
Posts: 7,832
Pike County, AL
Fuzzy_Bunny Offline
14 point
Fuzzy_Bunny  Offline
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Pike County, AL
Here is the method i use to determine distance to the lands: Link

That site has a lot of good information for developing accurate handloads, and it is worth taking the time to look around.

Re: Barnes TTSX 223 seating depth [Re: Rocket62] #2114804
05/15/17 10:20 AM
05/15/17 10:20 AM
Joined: Feb 2013
Posts: 7,410
Owens Cross Roads
Rocket62 Offline OP
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Rocket62  Offline OP
14 point
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Owens Cross Roads
I'll read it, thanks


Originally Posted by Rocket62
Just curious, are you just blowing off steam or did you really threaten me?
Re: Barnes TTSX 223 seating depth [Re: Rocket62] #2114808
05/15/17 10:22 AM
05/15/17 10:22 AM
Joined: May 2012
Posts: 7,832
Pike County, AL
Fuzzy_Bunny Offline
14 point
Fuzzy_Bunny  Offline
14 point
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Posts: 7,832
Pike County, AL
Originally Posted By: Rocket62
Originally Posted By: Fuzzy_Bunny
Originally Posted By: Rocket62
Working up a load for Barnes TTSX 62g in 223 for a DPMS AR15

Barnes load data states a COAL of 2.25 and recommends 0.05 off the lands so in theory I'd start with 2.25 - 0.05 = 2.2" COAL



You theory is wrong. You may be limited by magazine length, but you have to measure the col required for the bullet you are using to touch the lands. There are several different methods you can use to do this. Freebore and bullet shape varies and is not a constant.


Did I not do that with the Hornady OAL guage?


You did, somehow I skipped right over that. I am home in bed fighting a virus and evidently I am on some good meds laugh

The number you got is probably right. I would load them as long as I could get them to feed, work up my powder charge and then play with reducing col to,see if it makes a difference, which it probably will, even being that far off the lands.

Re: Barnes TTSX 223 seating depth [Re: Rocket62] #2114809
05/15/17 10:23 AM
05/15/17 10:23 AM
Joined: Feb 2013
Posts: 7,410
Owens Cross Roads
Rocket62 Offline OP
14 point
Rocket62  Offline OP
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Owens Cross Roads
Well take care and get well soon!


Originally Posted by Rocket62
Just curious, are you just blowing off steam or did you really threaten me?
Re: Barnes TTSX 223 seating depth [Re: Rocket62] #2114893
05/15/17 11:53 AM
05/15/17 11:53 AM
Joined: Nov 2014
Posts: 58
North AL
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Mike_W Offline
spike
Mike_W  Offline
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North AL
Just set them to 2,25 and load them. You're never going to touch the lands in your AR15 and still be magazine fed.

You can reliably load to 2.258" in most standard AR15 magazine as max length for them is 2.26"

And as stated before your theory is wrong.

Also when measuring to the lands you don't measure to the tip of the bullet...you measure to the ogive using a bullet comparator

Last edited by Mike_W; 05/15/17 11:56 AM.
Re: Barnes TTSX 223 seating depth [Re: Reloader79] #2115290
05/16/17 02:38 AM
05/16/17 02:38 AM
Joined: Feb 2013
Posts: 7,410
Owens Cross Roads
Rocket62 Offline OP
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Rocket62  Offline OP
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Posts: 7,410
Owens Cross Roads
Originally Posted By: Reloader79
I believe that 2.240" is as long as you can go with the ar15 mags, anything longer won't feed into it.


Measured mine this morning, 2.237" thumbup

Good info, thanks. It doesn't make a lot of sense to chase the lands if it can't fit in a magazine


Originally Posted by Rocket62
Just curious, are you just blowing off steam or did you really threaten me?
Re: Barnes TTSX 223 seating depth [Re: Rocket62] #2115716
05/16/17 12:55 PM
05/16/17 12:55 PM
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Posts: 3,902
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Reloader79 Offline
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Originally Posted By: Rocket62
Originally Posted By: Reloader79
I believe that 2.240" is as long as you can go with the ar15 mags, anything longer won't feed into it.


Measured mine this morning, 2.237" thumbup

Good info, thanks. It doesn't make a lot of sense to chase the lands if it can't fit in a magazine



I already been through everything your doing, so if I can help let me know. I measured the ogives on every bullet I have and some were closer than others, but all were limited to magazine length so I just loaded them all to 2.240" and let it eat.


If I agreed with you, we'd both be wrong.

Bluetick serpentines around green fields and rock spit a lease
Re: Barnes TTSX 223 seating depth [Re: Rocket62] #2116133
05/17/17 03:49 AM
05/17/17 03:49 AM
Joined: Nov 2014
Posts: 58
North AL
M
Mike_W Offline
spike
Mike_W  Offline
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M
Joined: Nov 2014
Posts: 58
North AL
What mags are y'all using to not get anywhere close to 2.26"? Only being able to squeeze in 2.23" is low...

Re: Barnes TTSX 223 seating depth [Re: Rocket62] #2117479
05/18/17 02:39 PM
05/18/17 02:39 PM
Joined: Feb 2013
Posts: 7,410
Owens Cross Roads
Rocket62 Offline OP
14 point
Rocket62  Offline OP
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Posts: 7,410
Owens Cross Roads
Some off brand, not even labeled. I'm switching to a Toolman Tactical, getting 2.275" with it. I'm gonna just seat 5-6 rounds with different charges at 2.25" and see where my pressure breakpoint is. After I find it and back off a bit I'll tinker with the seating depth

Thanks All, especially horsey300 grin


Originally Posted by Rocket62
Just curious, are you just blowing off steam or did you really threaten me?

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