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 Ramshot tac for 308 Winchester loads 
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Anyone ever use this combo? Varget is difficult if not impossible to find without giving up my firstborn.


Mon Sep 19, 2022 3:59 pm
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Yes, TAC is a great choice for 308 and can give higher velocity than a lot of other powder choices. I've had good accuracy with it, depending what rifle and what bullet weight it likes. In my experience TAC performs best at or near max loads.

The best source of data for it IMO is the free Western Powders load manual (I think 8.0 is the latest version). Western owns Ramshot and Accurate powders, and their data is very comprehensive. Based on my experiences with those powder brands, I trust that manual more than any other for Ramshot and Accurate powder data. It's also one of the few sources for actual 5.56 loads (vs the 223 data everyone else provides), which TAC is also excellent for.


Mon Sep 19, 2022 7:53 pm
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Yondering wrote:
Yes, TAC is a great choice for 308 and can give higher velocity than a lot of other powder choices. I've had good accuracy with it, depending what rifle and what bullet weight it likes. In my experience TAC performs best at or near max loads.

The best source of data for it IMO is the free Western Powders load manual (I think 8.0 is the latest version). Western owns Ramshot and Accurate powders, and their data is very comprehensive. Based on my experiences with those powder brands, I trust that manual more than any other for Ramshot and Accurate powder data. It's also one of the few sources for actual 5.56 loads (vs the 223 data everyone else provides), which TAC is also excellent for.

Thank you!!


Mon Sep 19, 2022 10:04 pm
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I would encourage you to post your process and results if you do try these loads.


Tue Sep 20, 2022 8:14 am
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Schoolboy wrote:
I would encourage you to post your process and results if you do try these loads.

Of course! 8 pounds is on the way.


Tue Sep 20, 2022 4:17 pm
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UPS is finally shipping my powder. In the meantime I have brass prepped! Prepping consisted of resizing, using RCBS Competition FL resizing dies, wet tumbling, trimming using a KWICK case trimmer, chamfering, inside neck cleaning with nylon brush and a drill, another quick wet tumble then a drying off by placing them in a cardboard box with an old hair dryer blowing into it.
All brass is LC trimmed to 2.006 +- .002


Fri Sep 23, 2022 2:48 pm
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Hopefully when sizing, you measured shoulder bump relative to brass fired in that gun, and carefully controlled that? Correct (minimal, but enough for clearance) shoulder bump is far more important for accuracy than precise case lengths, or a number of other things people do. A general rule of thumb is .001"-.002" bump for bolt actions, and .003"-.004" for semi-autos, although that can vary depending on several factors. And for clarity, that bump is measured between fired brass from that rifle (finding the longest measurements), and the same brass after sizing.

Cleaning inside case necks is another one, especially with excessive wet tumbling - it's not necessarily helpful, and if you've cleaned them to be spotless squeaky clean that actually hurts far more than it helps. It results in bullet cold weld if the rounds sit for very long, and shot to shot velocity can vary a lot more than dirty or mildly lubed case necks. If you did clean them to be spotless, I recommend putting a tablespoon or two of car wax in your dry tumbler media, and then adding the brass for a while once the wax has distributed evenly. This will deposit a little bit of wax in the case necks and will at least help with more consistent seating pressures and reducing velocity variations.

A lot of people put lots of effort and time into work that doesn't help the rifle shoot better, and sometimes (like with wet tumbling) can make it shoot worse. It's easy to fall into that trap - make sure you're not putting aesthetics or just OCD efforts in front of accuracy priorities.


Sat Sep 24, 2022 12:15 am
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I resize my cases that I have shot in the same rifle as they'll go back in, to a slight resistance on bolt closing. I also add a little car wash and wax to the wet tumbler and some NuFinish to the dry. I wish I had saved my chrono records when I got the new phone, but my shot to shot variance is minimal. This may not work for everyone, but it works for me.
ETA: The second wet tumble is just soap (car wash) and water. No pins.


Sat Sep 24, 2022 7:17 am
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