![Subsonic 223 imr 4227](https://loka.nahovitsyn.com/181.jpg)
But that was a while ago and I would have to do a major back note search. Worked the best on the vermin, and that one I used Bullsey. And they were single shots with these loads. Tried 2 other powders that were fast and I think Bullsey was one of then but The 1-7 shot a little better and was harder on the vermin. Vmax style bullets were two long and did not shoot as well. I remember just a slight bit more powder for the longer barrelīut not very much. 16inch was a little sharper report with a shorter barrel. 55grain Hornady SX seemed to work the best as they are short and don't need as fast a twist. I don't have my reloading notes handy, but it seems that I was using somewhere around 13-15 grains of 2400, and even at 13, a double. Velocity was 3000 fps and the smaller amount of powder kept the barrel cooler and helped reduce the muzzle blast. I worked with this a few years ago in a couple Ar's. These subsonic loads are what my 8' suppressed pistol likes. I've had good results shooting 2400 in a 223 using a 45 grain Hornady Hornet bullet. i'd probably bump them up a few 10th's and work down but it doesn't mention it so YMMVĬase: Winchester Twist: 1:12" Primer: Winchester SR, Small Rifle Barrel Length: 24" Trim Length: 1.750" you may find that pistol primers will give better ignition and lower es/sd but i'd use the 400's if thats all you got. Hodgdon H110 Hodgdon H4227 Hodgdon LilGun Improved Military Rifle IMR 4227 Improved. With subs start high and work down till below the speed of sound. 224) 55gr FMJ Bullets w/ Cannelure 500-ct 11 223 and Magtech Range. the shorter the bullet the better as at subsonic velocities especially in a 1:9 and slower twist stability can become an issue. if your going to run a suppressor always make sure to check for stability/keyholing before using it with your can. also i'd use the 55gr soft point assuming it's a flat base. want to say trail boss and titegroup were the powders used. I think wou can still find that bullet.Hodgdon has some sub load data. In rifles, this powder delivers excellent velocity and accuracy in such cartridges as the 22 Hornet and 221 Fireball. velocities respectively ranged from 1040 to near 1200 FPS as the charge climbed. Also I noticed that the 4227 seemed to be inconsistent on velocities. If a pistol says Magnum, IMR 4227 is the choice for true magnum velocities and performance. When I started shooting the 4227 loads (17.0, 17.2, 17.4, 17.6, 17.8) with the XTP's, the first shot would chrony 50 or so FPS faster than the next 3 shots, every time. Worked the best on the vermin, and that one I used Bullsey. IMR 4227 is a medium burn speed, magnum pistol propellant. I would think this would work perfectly for your goal. The velocities listed for a 14 inch barrel using 50 to 55 grain bullets (cast) range from the high 1800 fps to the 2100 fps range. Important Information: Do not exceed the loads displayed in the reloaders guide. Then, not only can you use IMR-4227, you can also use some good old standard powders like Unique or 2400. In rifles this powder delivers excellent velocity and accuracy in such cartridges as the 22 Hornet and 221 Fireball. Back then, most sources listed what many twenty-first-century handloaders would consider stupidly inadequate velocities, because companies listed every suitable powder.
![subsonic 223 imr 4227 subsonic 223 imr 4227](https://uploads.tapatalk-cdn.com/20171208/cfdeea8c7b1e3d4659612171bbf945c7.jpg)
If it says Magnum, IMR 4227 is the choice for true magnum velocities and performance. Other long-time IMR powders also work fine for reduced loads, including IMR-4227, IMR-4198 and IMR-3031, which were used a lot back when 10 zillion powders weren’t available. And they were single shots with these loads. is the Magnum Pistol Powder in the IMR lineup. I worked with this a few years ago in a couple Ar's. With subs start high and work down till below the speed of sound.
![Subsonic 223 imr 4227](https://loka.nahovitsyn.com/181.jpg)