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  #1  
Old 06-19-2009, 03:04 PM
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Have any of you guys used TAC in .30-06 150-180 grain loads?


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I have a source of it and it's a nice price ($108/8lbs seems cheap these days). I'll be making up some rounds for my Garand this weekend, and i'll probably use up the majority of my stash of RL12 and IMR4064.

Has anyone tried this powder? It seems like it is in the right burning range and it's advertised that it meters well.
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Old 06-19-2009, 03:12 PM
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Wow, TAC? I hadn't even thought to try that in my '06. Maybe that fast a powder is indeed appropriate for the Garand's gas system. I use Hunter in my '06 for 180 grain bullets, but that's a bolt gun. I'll try to remember to make some projections in QL if you'd like?
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Old 06-19-2009, 03:38 PM
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I love TAC in my 350 Rem mag.

Ramshot list loads for two 150 gr bullets in 30-06.

http://www.ramshot.com/powders/

...go to page 10 of the load guide.
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Old 06-21-2009, 09:11 PM
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I used 45gr TAC with 150gr fmj in my 03 a3 during a vintage military match. Was pleased with it.
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Old 06-22-2009, 08:06 PM
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Bolt guns can use slower powders than the Garand. The Garand's gas port is at the muzzle and if you don't want to bend the op-rod you have to limit that pressure. There are two ways to do that: one is to avoid slow powder and the other is to use one of the gas cylinder plugs that has ported screws to bleed off some of the pressure.

QuickLOAD suggests Ramshot TAC is OK with muzzle pressure up to around 49 grains under the 150 grain Hornady FMJ, but being double-base it has higher energy density than the more commonly used IMR 4895 or 4064, and as a result it fills the case poorly, using less than 80% of the available space in the case. That usually leads to irregular ignition, especially with ball powder. When I used Accurate 2520 for a season in my M1A under the 168 grain SMK's, I experimented and found that if I deburred the flashholes in the cases, the group size went down about 40% (1.25 moa to 0.75 moa). And that load filled the case over 90%. (I never saw any such effect on stick powder groups, btw; this seems to be a ball powder ignition thing.) So if you are going to try TAC I recommend you try adding that brass prep step your loading routine to see if it helps?

You may also find you need magnum primers for best results with ball powder, though I was using Federal 210M's at the time. Perhaps if magnum match primers had been available then, I would have found I no longer needed flashhole deburring? I didn't try it, so I just don't know?
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Last edited by unclenick; 06-22-2009 at 08:09 PM.
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  #6  
Old 06-29-2009, 03:39 PM
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Quote:
Originally Posted by unclenick View Post
Bolt guns can use slower powders than the Garand. The Garand's gas port is at the muzzle and if you don't want to bend the op-rod you have to limit that pressure. There are two ways to do that: one is to avoid slow powder and the other is to use one of the gas cylinder plugs that has ported screws to bleed off some of the pressure.

QuickLOAD suggests Ramshot TAC is OK with muzzle pressure up to around 49 grains under the 150 grain Hornady FMJ, but being double-base it has higher energy density than the more commonly used IMR 4895 or 4064, and as a result it fills the case poorly, using less than 80% of the available space in the case. That usually leads to irregular ignition, especially with ball powder. When I used Accurate 2520 for a season in my M1A under the 168 grain SMK's, I experimented and found that if I deburred the flashholes in the cases, the group size went down about 40% (1.25 moa to 0.75 moa). And that load filled the case over 90%. (I never saw any such effect on stick powder groups, btw; this seems to be a ball powder ignition thing.) So if you are going to try TAC I recommend you try adding that brass prep step your loading routine to see if it helps?

You may also find you need magnum primers for best results with ball powder, though I was using Federal 210M's at the time. Perhaps if magnum match primers had been available then, I would have found I no longer needed flashhole deburring? I didn't try it, so I just don't know?
Thanks for that informative write up, Nick.

I went shooting yesterday morning and found respectable results using 44.0 grains of H322 and PRVI 145 FMJ BT's (I got them cheap from Wideners (.15 each)). I'll probably use this load for a while, while I get used to the rifle with some informal plinking. I have over 10lbs of this powder on hand and I really like to use it when I can.

I have installed an adjustable gas plug on my Garand, so port pressure shouldn't be an issue for me.

As a sidenote: That durned -06 case sure uses a lot of powder compared to my 7.62x39!!
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  #7  
Old 06-29-2009, 03:41 PM
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Quote:
Originally Posted by highbrow View Post
I used 45gr TAC with 150gr fmj in my 03 a3 during a vintage military match. Was pleased with it.
Thanks I will make a note of that load and use it if I get some TAC.

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