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#5797046 - 06/19/15 06:13 PM .308 load up
Rob M Offline
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Registered: 04/13/11
Posts: 712
Loc: Denton, TX
Okay, so I'm just getting into reloading for my .308 AR. Below are the load ups I shot today. I loaded 178 grain A Maxes with varget staring with 43 grains all the way to 45 grains. My best groups seem to be with 43.3 and 43.4 grains of powder. I just need some expert feedback as to whether or not I'm on the right track?

Bullet-178 grain A Max
Brass-Lake City
Powder-varget
Barrel length-18"
Distance-100 yds
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#5797055 - 06/19/15 06:21 PM Re: .308 load up [Re: Rob M]
tth_40 Offline
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Registered: 04/05/10
Posts: 14001
Loc: North Texas.
I'd say top right target is your load. Can't quite read the charge.
43.2 looks promising as well. Good work so far. up
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#5797058 - 06/19/15 06:22 PM Re: .308 load up [Re: Rob M]
Rob M Offline
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Registered: 04/13/11
Posts: 712
Loc: Denton, TX
Top right is whatbim thinking too. It's 43.4 grains.
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#5797064 - 06/19/15 06:26 PM Re: .308 load up [Re: Rob M]
tth_40 Offline
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Registered: 04/05/10
Posts: 14001
Loc: North Texas.
You can see the consistency in your group shapes as they tighten up, that's a good indicator of not only well put together test loads, but of your shooting technique being consistent as well.
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#5797073 - 06/19/15 06:33 PM Re: .308 load up [Re: Rob M]
Rob M Offline
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Registered: 04/13/11
Posts: 712
Loc: Denton, TX
Yeah, I watched them tighten up pretty well, but it's hard to decide which load to run with. I might just load up the two best ones again and shoot to see if I get the same results.
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#5797080 - 06/19/15 06:38 PM Re: .308 load up [Re: tth_40]
FiremanJG Online   content
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Registered: 12/16/08
Posts: 21132
Loc: Wolfe City, TX
Originally Posted By: tth_40
I'd say top right target is your load. Can't quite read the charge.
43.2 looks promising as well. Good work so far. up


This.

If you want to retest them, do it at 300 yards and see what you get.
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#5797110 - 06/19/15 06:54 PM Re: .308 load up [Re: Rob M]
Buzzsaw Online   content
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Registered: 06/29/11
Posts: 9389
Loc: Frisco, Texas
yepper, now its time to stretch her out a bit
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#5797119 - 06/19/15 07:02 PM Re: .308 load up [Re: Rob M]
Rob M Offline
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Registered: 04/13/11
Posts: 712
Loc: Denton, TX
Gotta find a 300 yard range smirk I think there is one in Leonard,TX
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#5797254 - 06/19/15 08:52 PM Re: .308 load up [Re: Rob M]
FiremanJG Online   content
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Or you can come to mine, in Wolfe City, and have privacy...
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#5797362 - 06/19/15 10:04 PM Re: .308 load up [Re: Rob M]
jbd76266 Online   content


Registered: 04/17/09
Posts: 4495
Loc: Sanger, TX
Unless there are other supporting indicators, don't get too sold on the "best" group. Look at 43.2 which from what I can tell appears that you have 2 separate groups. One is tight, the other scattered a bit. Personally, I'm not sold on 43.4..sure it is the best looking group there, but 43.5 (just one tenth more) is really scattered. Without knowing anything more (chrono info, hot barrel or not, shooting set-up) I'd probably be looking at 43.2...maybe 43.3 and then adjusting my seating depth +/- 3 thou to try and tighten them up.


Edited by jbd76266 (06/19/15 10:06 PM)

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#5797425 - 06/19/15 11:28 PM Re: .308 load up [Re: jbd76266]
Rob M Offline
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Registered: 04/13/11
Posts: 712
Loc: Denton, TX
Originally Posted By: jbd76266
Unless there are other supporting indicators, don't get too sold on the "best" group. Look at 43.2 which from what I can tell appears that you have 2 separate groups. One is tight, the other scattered a bit. Personally, I'm not sold on 43.4..sure it is the best looking group there, but 43.5 (just one tenth more) is really scattered. Without knowing anything more (chrono info, hot barrel or not, shooting set-up) I'd probably be looking at 43.2...maybe 43.3 and then adjusting my seating depth +/- 3 thou to try and tighten them up.


The bottom 3 targets were shot last week, and 43.2 was my best group. I fired them all under the exact same conditions at an indoor range. The only thing I didn't do what chrono. I'm by no means done with my load up, but I have significantly narrowed the gap on which loads to test.


Edited by robdawg14m (06/19/15 11:29 PM)
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#5797543 - 06/20/15 07:41 AM Re: .308 load up [Re: Rob M]
jbd76266 Online   content


Registered: 04/17/09
Posts: 4495
Loc: Sanger, TX
In that case Rob I would stick with 43.2 and play with different seating depths. The charge above and below hit at close to the same poi and this lays in between. Just my thoughts

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#5797602 - 06/20/15 09:00 AM Re: .308 load up [Re: jbd76266]
Rob M Offline
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Registered: 04/13/11
Posts: 712
Loc: Denton, TX
Originally Posted By: jbd76266
In that case Rob I would stick with 43.2 and play with different seating depths. The charge above and below hit at close to the same poi and this lays in between. Just my thoughts


I'm limited to the OAL of the AR mag. The only thing I can do is seat them deeper than I currently am.
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#5797734 - 06/20/15 11:10 AM Re: .308 load up [Re: FiremanJG]
Big Fitz Offline
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Registered: 12/06/09
Posts: 2189
Loc: McKinney, TX
Originally Posted By: FiremanJG
Or you can come to mine, in Wolfe City, and have privacy...


I highly recommend JG's range. Awesome opportunity to go through all your steps with zero interruptions.
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#5797739 - 06/20/15 11:15 AM Re: .308 load up [Re: Rob M]
Rob M Offline
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Registered: 04/13/11
Posts: 712
Loc: Denton, TX
Should I try and shoot the load ups in a round Robin to see if I get the same groups? I shot 5 rounds of each load before moving to the vet highest.
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