71" low at 25 yards as possible, and this would give me the approximate 35 yard zero with a maximum point blank range of 238 yards. I would try to sight the rifle in to be as close to. One reason we dont see a lot of fast pistol powders is because they often. So, this 35 yard zero that I have shows that it would be. 9mm Ammo 300 Blackout Ammo Shotgun Ammo Rimfire Ammo Reloading Also in Ammo: Rifle Ammo Ammo Cans Subsonic Ammo Handgun Ammo Steel Cased Ammo Storage XM855. When shooting at very long ranges, or when using a subsonic cartridge like a 300 Blackout / Whisper, what heavy. What i would do, if i wanted these results but only had a 25 yard range, would be to then look at the balistic calculator in the bottom link below and zero the optic accordingly. I was pondering my earlier experience with bullet performance, and got to wondering about the other end of things, with low-velocity rifle bullets. Talked to a friend last night that knows way more about this stuff than I do. Tried a few powders up to 1100fps with no luck including 1680 and CFE BLK. I found the basis for this using the maximum point blank range calculator in the top link below. Bought as a nighttime coyote subsonic rig, so super isnt a huge concern for me. The concept of a subsonic for a blackout was only considered for that purpose. With testing done on a 12 sans-suppressor barrel, this loading averages out at 960fps. supersonic load I use will remain within 6" out to 238 yards if zero'd at 35 yards (second zero is at 206). The newest addition to Callaway Ballistics’ Shhh line of subsonic ammunition for suppressed applications, the 300blk offering features Berry’s copperplated, 220-grain Spire Point projectile. I like to zero for maximum point blank range. I would suggest that you take the ballistic data of the load that you are using and then use a couple of simple calculators that will give you a good idea of trajectory based on that load. As stated above it is going to depend upon the bullet/velocity that you are using.
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