Accurate 1680 Options
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Like the 125-grain Nosler AccuBond, this bullet delivered sub-par precision within the AAC carbine. I straight away assumed precisely the same bullet established-out problem was in charge, so I also examined it while in the CVA Scout. Group dimension was halved to a good measurement of all over 2 inches.
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Just after Talking with Nosler, I believe we observed the cause. The AccuBond's jacket is thicker than most conventional bullets, as well as Main just isn't pure, gentle guide, making it more durable for the taper crimp to get hold. My summary is definitely the a hundred twenty five-grain AccuBond desires a crimping groove.
I was attempting some new loads just last week. I haven't got my notes useful, but I recall very good results as far as precision with 1680.
357 Max includes 1680 in a wide array of bullet weights. The Legend data over the Hodgdon website lists only the 180gr bullet. The max demand listed is 27gr at about 31kpsi. The starting up cost is quite a bit significantly less, and I wonder if it would even cycle an AR. So, you might be all on your own. Like Captain Kirk.
Ordinarily, I'd personally agree. Â Having said that, I'm driving especially for SBR efficiency, and 1680 might give that in which other powders would not. Â I was just wanting to know if anybody experienced chrono'd any 223 loads with it from an SBR.
If you are making use of too gradual of a Accurate 1680 powder, the bullet will start to out-operate the gas output. This drops the strain, and more slows the burning rate of the powder. Until finally the pressure wave slams into the bullet, plus the pressure spikes.
The recovered diameter (RD) was calculated in inches over the deal with of the bullet in two places and signifies the typical of People two measurements. The recovered pounds (RW) is the weight in grains of the largest part of the bullet. Screening was done at an elevation of 2,200 ft over sea stage.
Acquire All those two groups out of the combination, and the common group sizing falls to 2.42 inches—much more than .70 accurate 1680 load data inch a lot better than the standard for that six supersonic manufacturing unit loads I examined within the MPW carbine. Probably the most accurate handload beat out the ideal factory load by accurate 1680 powder .sixty inch when the two were fired with the identical gun.
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Terminal-general performance screening yielded some fascinating success, which might be in depth in the accompanying sidebars, and so did the handloading work out. You will get terminal general performance over and above the reach of at the moment offered manufacturing facility ammo from .