![]() ![]() The powder i want to use is LIL GUN, mainly bc i could find it. I am using some hornady 150 gr SST and some older spier points that i had laying around. Ok so i have finished my batch of brass and i am starting to work on my load data for the 300 BLK. Go to 300BLK forum for a cornucopia of knowledge on all things 300BLK. Subsonic rounds do not expand and are not the best choice for hunting. Fortunately Lil'gun is a very good supersonic powder. A good guideline is for best feeding, you want to set the ogive of the bullet so it is the same diameter as the 223 round where it hits the forward rib of the magazine.Īlso, for hunting, I would recommend scrounging up some 125 Pro-Hunters and using those instead. The recommended OAL for a 210 SMK is 2.120, and the Barnes is likely fairly long for weight so you may have to go a touch longer. If you absolutely have to give Lil'gun a try, a good starting load with a 200-210 gr bullet is from 8.2 to 8.7 gr, with an OAL dependent on specific bullet. Shooting with a suppressor increases backpressure and helps cycling alot too. If you are going to shoot alot of subs, I would also recommend enlarging the gas port to. I say this from experience, using an optimized system (standard CAR buffer, GI CAR spring, and well-lubed semi-auto carrier). You may also have luck with RL-7, or H4198, but those are more finicky. I have experimented with both carbine and pistol gas systems, and pretty much the only powder that reliably cycles a subsonic load in carbine gas is A1680. In your short barrel they may actually be slow on the bottom end of the load range.Lil'gun will work well for subsonic 200 gr, but almost certainly will NOT cycle your AR. It's longer than the ELD and weighs more, so those loads will be safe, but possibly fast in a 16" barrel. In your case, depending on powder used, I would substitute data for a 230 Berger, I know both Accurate and Hodgdon have data for it. The reason for doing this would be knowledge gained, giving you a better idea of how this all works. You can use the data and load as a single shot, working the cartridge length down, watching for pressure signs. If the COL, like in your case, is longer than magazine length by doing that, the load will be safe to shoot, as long as it does not seat into the lands of the barrel. ![]() I have a little twist in Rebel's method that allows a pretty quick conversion of bullets in data.Ĭase length + bullet length - COL= seated depthĬase length + bullet length - seated depth = COLĬonfirm that the bullet is not seating in the lands of your barrel. Accurate's load data divides it into sub and super sections, so you can actually see what a max pressure load is. If it is related to pressuure, start in the middle. Keep in mind that most data for 200 grain plus data is for subsonic velocity, not max pressure, pay attention to that, it gives a little wiggle room for loads if max is related to velocity. You're on the right track comparing lengths, weight and seated depth. Easiest is to join a forum and say "give me load data for this combo". Start high and work your way down to subsonic. Since you will be developing subs, the deeper the bullet the more pressure i.e. Not sure what powder you have, but if using 1680, you can check recommended sub charges and quickly ensure you are not compressing. I would make a dummy case to 2.25, measure base to ogive of another eld bullet, then measure cartridge base to ogive and subtract the case length to determine how much bullet you have in your case. How should I go about starting to develop this load? I will be shooting out of a 10.3" AR with a pistol gas tube. A 220gr SMK is recommended at 2.260" COAL. ![]() The 9th ed Hornady manual has load data for a 225gr bullet, but upon researching it, the bullet is 1.558" long. Got o looking afterwards, and there is zero load data available for the 300 BLK with this bullet. I picked up some 30 cal 220gr ELD-X pills at cabelas. JasonPegg wrote:Hey guys, I am fairly new to reloading. ![]()
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