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#2113906 - 05/14/17 11:13 AM Barnes TTSX 223 seating depth
Rocket62 Offline
14 point

Registered: 02/25/13
Posts: 7019
Loc: 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?
_________________________
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#2114230 - 05/14/17 08:45 PM Re: Barnes TTSX 223 seating depth [Re: Rocket62]
trlrdrdave Offline
10 point

Registered: 09/04/07
Posts: 4036
Loc: Flint City, AL
Since it's magazine fed don't you stick to COAL and not worry about distance off the lands?
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#2114260 - 05/14/17 09:12 PM Re: Barnes TTSX 223 seating depth [Re: Rocket62]
Reloader79 Offline
Bitch Peas, I'm a Kitty Whisperer

Registered: 09/14/15
Posts: 2807
Loc: Behind your shadow
I believe that 2.240" is as long as you can go with the ar15 mags, anything longer won't feed into it.
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#2114797 - 05/15/17 03:15 PM Re: Barnes TTSX 223 seating depth [Re: Rocket62]
Fuzzy_Bunny Offline
12 point

Registered: 05/11/12
Posts: 6101
Loc: Pike County, AL
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.

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#2114799 - 05/15/17 03:17 PM Re: Barnes TTSX 223 seating depth [Re: Fuzzy_Bunny]
Rocket62 Offline
14 point

Registered: 02/25/13
Posts: 7019
Loc: 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?
_________________________
When I die I don't wanna go quietly in the night. I wanna slide in sideways kickin and screamin ... Life is good, soak it up while you can.

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#2114802 - 05/15/17 03:19 PM Re: Barnes TTSX 223 seating depth [Re: Rocket62]
Fuzzy_Bunny Offline
12 point

Registered: 05/11/12
Posts: 6101
Loc: 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.

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#2114804 - 05/15/17 03:20 PM Re: Barnes TTSX 223 seating depth [Re: Rocket62]
Rocket62 Offline
14 point

Registered: 02/25/13
Posts: 7019
Loc: Owens Cross Roads
I'll read it, thanks
_________________________
When I die I don't wanna go quietly in the night. I wanna slide in sideways kickin and screamin ... Life is good, soak it up while you can.

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#2114808 - 05/15/17 03:22 PM Re: Barnes TTSX 223 seating depth [Re: Rocket62]
Fuzzy_Bunny Offline
12 point

Registered: 05/11/12
Posts: 6101
Loc: 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.

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#2114809 - 05/15/17 03:23 PM Re: Barnes TTSX 223 seating depth [Re: Rocket62]
Rocket62 Offline
14 point

Registered: 02/25/13
Posts: 7019
Loc: Owens Cross Roads
Well take care and get well soon!
_________________________
When I die I don't wanna go quietly in the night. I wanna slide in sideways kickin and screamin ... Life is good, soak it up while you can.

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#2114893 - 05/15/17 04:53 PM Re: Barnes TTSX 223 seating depth [Re: Rocket62]
Mike_W Offline
spike

Registered: 11/21/14
Posts: 58
Loc: 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


Edited by Mike_W (05/15/17 04:56 PM)

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#2115290 - 05/16/17 07:38 AM Re: Barnes TTSX 223 seating depth [Re: Reloader79]
Rocket62 Offline
14 point

Registered: 02/25/13
Posts: 7019
Loc: 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
_________________________
When I die I don't wanna go quietly in the night. I wanna slide in sideways kickin and screamin ... Life is good, soak it up while you can.

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#2115716 - 05/16/17 05:55 PM Re: Barnes TTSX 223 seating depth [Re: Rocket62]
Reloader79 Offline
Bitch Peas, I'm a Kitty Whisperer

Registered: 09/14/15
Posts: 2807
Loc: Behind your shadow

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

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#2116133 - 05/17/17 08:49 AM Re: Barnes TTSX 223 seating depth [Re: Rocket62]
Mike_W Offline
spike

Registered: 11/21/14
Posts: 58
Loc: 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...

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#2117479 - 05/18/17 07:39 PM Re: Barnes TTSX 223 seating depth [Re: Rocket62]
Rocket62 Offline
14 point

Registered: 02/25/13
Posts: 7019
Loc: 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
_________________________
When I die I don't wanna go quietly in the night. I wanna slide in sideways kickin and screamin ... Life is good, soak it up while you can.

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