I ended up with some range pickup x39 brass and the die was cast, so to speak. So, I managed to stumble across some numbers with many powders, but I am a bit nervous about pistol powders. I would like it to at least cycle unsuppressed.
#SUBSONIC 223 IMR 4227 MODS#
There is this guy: which is a fair reference point.įirst, my objective: I want a reasonably accurate subsonic load I can shoot out of my AK without any mods other than the suppressor. It’s there, if you spend ages searching for it, but really tough to verify. The threads were far more ‘true’ than on my US made M1A Socom 16 :roflmao: Anyway, subsonic data has been hard to come by for the 7.62x39. 223 rifles, a couple 308 ARs and got around to the AK most recently. I made a couple Form 1 Suppressors last year in 7.62 caliber, equipped with a rear adapter for a YHM QD mount. If you get an honest 1.5 moa CONSISTENTLY with subs, you're way ahead of most other 300blk shooters.I have a 90’s era AK47 in 7.62x39, receiver is US made, and I am not clear on the country of origin for any of the rest of the original parts. Note that most folks post pics from 50 yards in this type of application. WAY better than what most people are getting subsonic.
Your group pic and orkans look fantastic. I've not messed with it enough to say for sure, but might be worth a shot if your rifle likes it. There is a guy who shoots old milsurps here with good success and he swears by it with reduced jacketed loads. Lube the jacketed bullets before you shoot them. One rifle really liked the flat nose 30 30 bullets and the rubber tipped hornady 30 30 bullets. Without getting into cast stuff, you still have lots of options to try. Trail boss was exceptional with the light bullets. As far as powder, Lil gun was probably the best. With jacketed, The 208 a max performed well subsonic for me, as well as the 180 and 220 round noses. Both good as far as I could tell once they were neck sized for the rifle. there is a light 90 or 95 xtp that shot lights out in a couple different 300blk rifles with trail boss. Likely could be improved with better casting technique. The heavy 249g cast bullets were usually the best, generally 1.5 moa give or take a littlr at 100. Otherwise did fine with jacketed bullets from 90 to 249g. Load and shoot like you're doing elr work.
Handloading needs to be top tier level too. Follow through makes a big difference for sure here. but it is doable I think.Ĭast bullets done right can indeed make this easier and more consistent,BUT it adds another set of variables for sure.Īll the little things add up with subs, especially shooting form.
1 or just a little under consistently is a tough goal. but if your gun shoots both just fine i guess it wouldn' matter.īetween 1 and 2 moa at 100 yards with subs is quite good in my book, especially if it's consistent. Idk about berger hybrids, but the berger vld's have less than forgiving tangent/ogive and you need a chamber made to match that, the sierra's are more forgiving. 010 then i dont think crimping would help but if it was. Neck turning is for tight neck chambers, if you don't have a tight neck chamber do not turn your cases, the additional case neck expansion is worse then poor cocentricityĬrimping maybe, idk, some people say yes, it may depend on the amount of case neck tension you had, if your already doing. I don't see a level on your gun, maybe it's on the other side or you don't have one You can't just reduce the speed/charge weight of a normal burning powder and let that be your subsonic load.
#SUBSONIC 223 IMR 4227 FULL#
I don't know anything, with that being said that powder has a burn rate similar to that of full load/full power powders for that cartridge, so i would probably look at a fast burning pistol powder. I’ve tried multiple Bullets and found that the Berger 220gn hybrid and Sierra 220gn bthp shoot the best so far.so I’ve been trying to develop a load with those two. Is there anything else I can do to ensure consistent neck tension? Would crimping be a good option? I just hate to crimp for a bolt gun.Īnd, of course I could be going down the wrong rabbit hole here. The reason I think neck tension is the issue is because of the variable resistance I see when seating projectiles. Please let me know if you guys think I’m off track. I have since ordered a few hundred 223 Lapua cases, neck turning lathe, neck sizing die, as well as a Redding bushing die. Using brass made from 5.56 lake city cases, the best I can do hovers around 2 moa. I may also try them kissing the lands as well. With this load, I was able to manage barely 1 moa five shot groups. I separated my brass and loaded all same headstamp brass with 220gn Berger Hybrids, and 10.5gn CFE BLK. I suspect the issue may be with neck tension, and inconsistencies between neck wall thickness and brass hardness. I have found some inconsistencies with muzzle velocity, and I’m working hard to understand the problem.
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