They’re 220 Gr as well, but they are shorter in length than the Sierras. with the capability of switching between subsonic or supersonic ammunition. The next issue I’m having is what to do with the Berrys bullets if I can’t find any published load data for them. 62X39, 300BLK, most load data does not allow one to compare apples to apples. Is there any reason to choose one over the other if I’m using published load data? At 1065 fps), or H4198 (12.0 compressed gr at 1083 fps), all of which I have. The book calls for Accurate 1680 (11.8 Gr, 1103 FPS), Reloaders 7 (11.5 Compressed Gr. The Lyman book has the Sierra’s and I planned on loading those up first due to not being able to find much load data elsewhere. I also have the Lyman 50th, and the Hornady 10th edition books, neither of which have the Berry’s bullets in them.įirst, my most broad question: Is it going to be possible to stabilize these with my barrel? I planned on starting at the top of the published subsonic loads I can find and working my way down to hopefully find something that works. I will be shooting out of a 7.5 inch barrel with a 1:8 twist, and the only bullets I have been able to get my hands on are Sierra Matchking. Rifle reloading handloading data for rifle calibers. some of those xtreme pentrator/defender bullet heads, and they provide load data. You may end up anywhere between 5-7 grains Unique with that bullet start on the high end and work down to 1000-1030 fps. Vihtavuori offers rifle reloading data for numerous calibers and bullets for. 300 Ammo Walmart And 300 Blackout Subsonic Ammo Reloading BY 300 Ammo. Sticking a bullet in the barrel is no fun. 300 rounds and I come to you all for some insight, because I’m worried about my rounds stabilizing. Notice I said 'work down' do not attempt to work 'up' for subsonic loads, especially with jacketed bullets. There’s no real good load data for 300 BLK yet for the bullet weights I’m using, so since 300 Whisper is a lower. At 18 grains everything starts to wear out quicker and the load becomes dangerous. FYI I have since found the 125gr FMJ #30196 is FAR better for cheap supers in the caliber, and loaded over 20gr of CFE BLK it is decent, but CFE BLK is better suited as a subsonic powder(or with the 110gr v-max), H110/W296 is FAR better for most supers, 18gr under that 125gr bullet crimped to the cannelure is accurate and IIRC at least 100FPS faster in my 9" rifle.I’m having a little difficulty figuring out how I want to load up my subsonic. The max load on a 300 Whisper load (from what I remember, don’t quote me) for 150 grain projectiles is somewhere around 18 grains of H110. I would try 19, 19.5 and 20C as a max load at 2.100(crimp in cannelure), and work it up to see what works best. IMO CFE BLK is really forgiving, you would have difficulty stuffing enough in the case to get over pressure. Ive finally made the jump and decided to build a 300 Blackout AR.Looking for others to post their results. 300 Blackout Subsonic Loads Jump to Latest Follow 1 - 20 of 22 Posts 1 2 Next T tlxiong82 Registered Joined 146 Posts Discussion Starter Load: 125 grain Speer TNT, 17.6 grains H110. You can also check in our bullet database for which Hornady bullets we offer load data. Rifle used: Ruger American Rifle Ranch, 300 Blackout, 16'barrel, 1/7 twist. There is published data in Hornady and Sierra for a range of bullets( Sierra pictured above) with closer OAL and about 20C-20.5C as a max charge. 300 Blackout Loads Getting serious now with reloading 300 Blackout. NOTE: Powders H110 and WIN 296 are Identical. As with any Published Load Data, USE CAUTION, double-check Load UP slowly for supersonic, and DOWN slowly for subsonic when experimenting with undocumented loads. Sierra Jacketed SP BC: 0.338 2.100 OAL SD: 0.226. Originally offered in our 300 AAC Blackout A2116-33 ammo, it has given proper feeding. Problem is if you crimp to the cannelure, should be about 2.100" OAL. 300 AAC Blackout (7.62 x 35 mm) (300 BLK) 125 gr. Hodgdon list 18.8 - 20.5C with a magnum primer and OAL of 2.235. I buy them in bulk for my 308 ARs and M1A, so was hoping I could make a "good enough" cheap super load for 300, but it kinda sucks. I will be shooting out of a 7.5 inch barrel with a 1:8 twist, and the only bullets I have been able to get my hands on are Sierra Matchking. 300 AAC BLACKOUT: Barrel: 16' Twist: 1-10' Primer: WIN WSR Bullet Diameter. 300 rounds and I come to you all for some insight, because I’m worried about my rounds stabilizing. FYI I have since found the 125gr FMJ 30196 is FAR better for cheap supers in the caliber, and loaded over 20gr of CFE BLK it is decent, but CFE BLK is better suited as a subsonic powder(or with the 110gr v-max), H110/W296 is FAR better for most supers, 18gr under that 125gr bullet crimped to the cannelure is accurate and IIRC at least 100FPS. Have loaded that bullet with that powder in 300BO, ended up at 19.5gr compressed IIRC and it runs fine, although a little slow. I’m having a little difficulty figuring out how I want to load up my subsonic.
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