Limited Component Load Development
- Thread starter DMW1116
- Start date
I shot my last set of tests for TAC and the 52 grain Match Burners. It appears I was a little under the optimal charge. The load I was using is purple, with the other shot below the paper. Orange, black, and yellow settle down considerably. I’ll probably split the difference between black and orange. Green was promising but it’s lies outside the other groups kinda by itself.
TAC powder
Yellow - 25.2 grains
Black - 25.0
Orange - 24.8
Purple - 24.6 (Old Load)
Green - 24.4
Red - 24.2
Blue - 24.0
TAC powder
Yellow - 25.2 grains
Black - 25.0
Orange - 24.8
Purple - 24.6 (Old Load)
Green - 24.4
Red - 24.2
Blue - 24.0
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Soonerpesek
Member
Those two to the immediate left of the target tried to go in the same hole…
I’d concentrate more on those….
CoalTrain49
Member
Seven pages and I still don't know what action or barrel is. I must have missed something.
No, it’s hard to catch. It’s mostly about being confident in a load without using a whole box of bullets and primers to find it. I’d run through loss and fooled myself more than once.
I used a 16” PSA AR with a 1/7 twist nitride barrel, a PSA M16A4 copy with an FN chrome lined 20” barrel, also in 1/7 twist, and a late 70s era Marlin 336 in 30-30 and cast bullets from Acme and Missouri Bullet Company. I also used a PSA AR10 with a 20” stainless barrel.
I used a 16” PSA AR with a 1/7 twist nitride barrel, a PSA M16A4 copy with an FN chrome lined 20” barrel, also in 1/7 twist, and a late 70s era Marlin 336 in 30-30 and cast bullets from Acme and Missouri Bullet Company. I also used a PSA AR10 with a 20” stainless barrel.
JFrank
Member
Referencing your charges that correlate with each color help readers follow along. Thx
Ah, right.
TAC powder
Yellow - 25.2 grains
Black - 25.0
Orange - 24.8
Purple - 24.6 (Old Load)
Green - 24.4
Red - 24.2
Blue - 24.0
I also like how yellow shows up. I hadn’t tried it before. I can see all the colors I have except brown. It looks like black after the alcohol treatment.
AJC1
Member
My calculations say 25.48 was my predicted best load with a 55. I bet a tenth or so higher would be the 52 load.
JFrank
Member
Thanks, much easier to follow. Looks like your on the right path.
Barnes max is a bit over 26 even. I could keep pushing, but these results are more than satisfactory for a 20” chrome lined upper that isn’t free floated. I need a little TAC left to replenish my full power FMJ supply. I don’t intend to get any more of these bullets unless they just amaze me when I start shooting for score. I’ll have to switch back to the handle sights to see how that goes.
AJC1
Member
That is the 223 load....which I find near max is best. The 556 load will be over a grain more. I havent found the additional powder useful. If one was shooting the ttsx the terminal performance would probably justify it.
Barnes doesn’t have 5.56 data for this bullet, but it’s probably similar to those that do. If I decide to get more I’ll push on up. Maybe I can with Match Rifle or Tactical Rifle. They both seemed to work well enough with the 69 grain RMR.
Blue68f100
Member
I'm pushing the 52gr SMK @ 26.2gr as I posted above. These are moving 3255 fps out of my 24" barrel. With the 55gr Hornady 55gr FMJBT I found the best load to be in the 24gr range. I have not done a lot of work up with the 55gr due to the fact that I have several 8# jugs of CFE-223 that I worked up before I got the TAC.
AJC1
Member
Your charge for the 52 makes perfect sense.... sounds like you hit a lower node with the 55 because that's my 69 load. I might be in the high node... I need to start plotting all this out.
JFrank
Member
The yellow charge nicely overlaps the previous black charge. A pause/ flat spot so to speak, that should be a good place to load as well.
One of the black shots should be a little lower. I pulled it high but I don’t know which one. The row of the single purple, black, and two oranges shots are all together. Orange nests inside the black shots, but it’s hard to see from the front. The colors except black are clearer from the back of the sheet. The shots from the whole range from orange to black to yellow all fit inside 1.2”. Any individual charge in that range will suffice for my purposes. That whole range is pretty wide w/r to weight.
I’m getting ready to load these. I plan to split the difference between black and yellow at 25.1 grains of TAC.
I’m also reviewing the results from the 69 grain RMR test with Match Rifle. I think I tested two different ways and got the same result. If so, I’ll be satisfied with that and run with the load.
I’m also reviewing the results from the 69 grain RMR test with Match Rifle. I think I tested two different ways and got the same result. If so, I’ll be satisfied with that and run with the load.
Jim Watson
Member
What do you color code your bullets with?
I wanted to distinguish some pistol loads and Sharpie just didn't do it; under good lighting, I could just barely see a hint of color on the target... sometimes.
kmw1954
Member
I have been waiting for some stable weather and uninterrupted range time to set some new loads for a 6mmARC I just received. Right now it's 1 bullet and 4 different powders, 3ea of 5 varying loads. Consists of TAC, Benchmark, A2460 and BL-C2
JFrank
Member
If color transfer becomes difficult you may want to use s dab of alcohol on a swab to retrieve/enhance the color off the target.
I use sharpie but I also wash the target with rubbing alcohol. Just blot it from the back at each hole and it runs enough to see.
LiveLife
Member
Nevermind, thought you were loading 69 gr bullet but reading previous posts, you are loading 52 gr bullet.
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