See that Sierra Bullets have now lowered their starting loads in their new loading manual. Now I can use my AA1680 powder when I buy more 220gn HPBT bullets by using lower loads like you have suggested.Ģ. If I can't get 10.9 gn in a case how can they list 11.2 to 14.5?ġ. My point is I think the data given above from Sierra is bogus. I'm running a 9.5' Rainier barrel and an Octaine 45 suppressor if that makes any difference. Did I misread the article, or is it just due to the 'aging' process. I'm starting to load 300 blackout and looking for the best bullet weight, powder type/grains for sub sonic suppressed. Im a long-time reloader, Im confused as to the description of the supposed 'easy' reloading process that is supposed to handle the new case size. If I ever load any more for my son I will go with 220gn bullets that will allow more powder volume. 300 BLK also shows its strengths when short-barreled rifles and silencers are involved. I have several emails with Sierra bullet and they said my brass volumes were too small! I was reloading once fired 300blk brass from HSM ammo (Montana). Subsonic Blackout is a good fit with a suppressed. Jones to be a subsonic round that would fit, feed, fire and function in an AR-15 carbine. 300 Whisper, was developed by well-practiced wildcatter J.D. The latter will be the focus of this blog post. A powder mfg data does not have the "exact" bullet used to calculate their loads/velocity. 300 blackout takes two essential forms: supersonic and subsonic. No major reloading issues to think of and the smart manufacturers are using twist rates very friendly to subsonic loads as well as. I moved into the 300 BLK because it is easy and safe to play in the subsonic realm. I generally would think the bullet mfg data would be more accurate because they are using "their" bullet. I built my 16' 300 Blackout 700 bolt gun because I primarily wanted a centerfire cartridge with a low report. The Hodgdon on-line load data today states Starting load of Null and Max load of 10.7gn. Why would I start at less than the starting load? This was for my son's Wilson Combat AR-15 w/ suppressor and wanted it to cycle. Identical loading dies are used for both. 300 Whisper, but the Blackout includes a. It’s essentially the same as the original. The Sierra bullet guide ( above ) listed "Starting?" Load of 11.2gn. 300 AAC Blackout, while occasionally seen in bolt rifles like Ruger’s American Rifle, is most commonly seen in AR-15 platforms. As you mentione my Lee Precision die instructions listed a "Starting" Load of 10.9 gn of AA1680. Order your 350 Legend ammo online todayThis load utilizes the innovative Hornady Sub-X (Subsonic eXpanding) bullet. 64ĬOAL: 2.200 inches 5-shot 75-yard group (inches): 2.My original post was back in 2015 and Accurate powder load data was not on the Hodgon on-line site yet. Federal Premium AR Match Small Rifle Primers (GM205MAR) and new Lapua brass were used in all loads.īe Alert: Publisher cannot be responsible for errors in published load data.ĬOAL: 2.070 inches 5-shot 75-yard group (inches): 1.54ĬOAL: 2.070 inches 5-shot 75-yard group (inches): 1.78ĬOAL: 2.070 inches 5-shot 75-yard group (inches). 300 blackout subsonic rounds for 6 cents apiece, which of course doesn’t include the cost of. 300 Blackout Pistol with 10 1/2-inch barrel and a Swarovski 1-8x 24mm Z8i scope was used to test all loads. In the below video YouTube channel Rolling Blackouts demonstrates his technique for reloading. Warning! DO NOT REDUCE POWDER CHARGES AS DANGEROUS PRESSURES MAY RESULT!Īn Alexander Arms Highlander.
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