I’ve ordered a “light buffer kit” which has three AR buffers going down to 1.7 oz. While this got me most of the way to 100% functioning, I’m not QUITE there yet. Replacing the H (Heavy) buffer with a standard Carbine buffer.Replacing the heavy buffer spring with a standard AR carbine spring.A fresh coat of oil in the BCG (never hurts with an AR!).At 10.7 grains, I was able to get 90% functioning by doing the following: The N-PAP was 100% functioning in my testing (only tested 10.7 grain load since I was focused on dialing-in the KS-47).įor the KS-47, as mentioned previously I had issues with ejection and feeding. Predictably, the 16″ AK carbine chewed through the 220 grain 7.62x39mm subs like it always does: without complaining. Tweaks to the KS-47 For Proper Functioning Here’s the chronograph data for this load: Chrono Data: KS-47 8.5″ AR Hybrid Pistol This load performed good in the KS-47 (see next section), and perfect in the 16″ AK. After increasing the powder charge and performing incremental testing (increasing by about 0.2 grains at a time) I ended up with the following load. When I shot the 9.5 grain loads in the KS-47, they would shoot fine, but would not eject the spent shellcasings, and would not chamber the next round of ammunition. Since I couldn’t find load data for 7.62x39mm 220 grain plated bullets, I decided to *start* with the same powder charge, only, but substituted 7.62x39mm cases, and large rifle primers in place of the magnum small rifle primers used for 300 blackout. Always cross-reference load data with manufacturer’s published data. Ultimate Reloader is not responsible for errors in load data on this website. When I started my quest to load 220 grain plated 30 caliber Spire Point bullets from Berry’s Manufacturing for 7.62x39mm For Review: 300 Blackout Loads with Berry’s 220 grain bullets: If you want to load heavy subsonic bullets for the 7.62x39mm, you may scratch your head looking for data. 7.62x39mm Sub-Sonic Loads: Thinking Outside the Box I also wanted to be able to shoot these loads in my N-PAP AK variant carbine-length rifle, but I knew that rifle would be inherently less picky, so I used the KS-47 for the primary load development activities. I really wanted something that would work great in my PSA KS-47 8.5″ AR hybrid pistol chambered for 7.62x39mm. The first thing I sorted out was what rifles I’d be loading these subsonic loads for. By accepting these terms, you agree that you alone are solely responsible for your own safety and property as it pertains to activities, procedures, techniques, or practices described in whole or part on this website.Ultimate Reloader, LLC and Making With Metal can not be held liable for property or personal damage due to viewers/readers of this website performing activities, procedures, techniques, or practices described in whole or part on this website.
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