![]() 002 and could easily have been user error), loaded 10 rounds each with COL of 2.036 & 2.038, benchrest fired the two groups for accuracy and velocity COL 2.038 to be both slightly more accurate as well as slightly more consistently stable velocity as well when I say "slightly" I mean significantly less than a single standard deviation, so while it's pretty much a meaningless difference between the two and I definitely tend to nerd out over the data (clearly), I just went with my gut and followed where the data seemed to be heading. To determine my target seating depth I measured the powder height of 20 filled cases, took the average height of the powder level (which only varied by. The subsonic 300BLK load I've had success with using Sub-X bullets is 12g CFEBLK, 190g Hornady Sub-X, COL 2.038, seated so the bullet is sitting gently on the powder without compressing it (approximately). Odds are better than average that it won't happen that way.Ĭlick to expand.Sorry for the delayed response. If you can figure out how to make quiet subsonic 180 grain or under ammo you will become famous because not many people have figured out how to do that (and it's not from a lack of trying).īasically put the idea of running the same bullet in each rifle to bed. Pretty much unless you are shooting a bolt action rifle your bullets all need to be 190 grains or more to get reliable subsonic ammo. I've tried several slow powders and it had the same result every time. It won't be hearing safe at the ear at all. Basically that powder and how it creates pressure is relatively slow, and with almost any slow powder, the bolt will open while everything is still under pressure and the port pop will be LOUD. You CAN use a powder like Reloader 7 to get subsonic loads for all types of light bullets but the characteristics of the powder make it really loud. Since you said you are kind of a newer reloader let me know if you understand what powder shift is. ![]() You will basically cut back to the point that you get powder shift problems or cycling issues. Even then 190's are harder to develop a load for because they are a bit more picky when it comes to using the right powder. There are a whole host of issues when you try to go lighter than 190. Given we are talking about jacketed bullets here. Not really sure if he called EBR about it to see if they would make it right.In an AR it's a lot more complicated to try and get subsonic performance out of anything under 190 grains. I wish he would have recovered the bullet, but he was so upset he just went back home and didn't mess with it. The javelina took off in a run, but didn't get the extra hole in his head my F-I-N was trying to put there. My Father-in-law also shot a javelina in the head at 50yds with the same loaded ammo, (purchased about a year before the ammo mentioned above) and it bounced off the animal. I know they were contacted about it to see if the issue could be resolved but to make a long story short, I believe we still have the ammo but it just sits on the shelf somewhere. I have no idea if the bullet actually expands at subsonic speeds as we were never comfortable enough to use it on a live target. some of the projectiles barely made it to 20 yards before hitting the ground while others actually made it to the paper target at 50yds. 308 loaded ammo from EBR (I believe it was loaded with their thumper bullets) and it was horrible.
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