![]() But I am just loading general use rounds, and use some at three gun. So I want to use some kind of ball powder since I will just meter the charges and load the rounds on a 650, so I also use the powder check. So I am going to drop charges, and if I am doing this on a progressive, I want to use the powder check. Are these for a bolt gun or carbine? I figure Imma gonna drop charges for a carbine, and I do not currently have a bolt gun in. I think a big question is how you plan to meter the charges, and if you are planning to do single stage or progressive. I will probably get some and load them into random cases I bought, when you miss at three gun you just shoot again, and it not typically because of the cartridge. Now I am curious about these RMR 75gn BTHPs (ETA: I forgot the link.), since they are like half price. I bought a bunch of SMK77s one day when I found them in stock, and I have a bunch loaded into nice once fired LC cases. If you are going to weigh each charge I say get started with the Varget, but if you meter it there can be bridging and other inconsistency, so I would for sure use a powder check if you are on a progressive. The way I figure it is that you can load 77gn for the same effort. Using the faster powders and 77's you will not be able to. You would NOT buy N140 or N540 to use with 55 grain bullets. We did NOT test every bullet with every powder, because its pointless. It took us many months to prep all the brass to get to the point we could test. So I want to use some kind of ball powder since I will just meter the charges and load the rounds on a 650, so I also use the powder check. This is our method to get consistent results. Powder is a mixture of cinnamon, cloves, fennel, star anise, and Sichuan. So I am going to drop charges, and if I am doing this on a progressive, I want to use the powder check. 5.56x45mm is the benchmark for reliability and versatility from a light. CFE223 meters well and a good friend likes it for his 77 grain loads.I think a big question is how you plan to meter the charges, and if you are planning to do single stage or progressive. It can be pricey, and sometimes hard to find. Varget is the most popular powder for 69+ grain 223 loads. Load them at 2.260 OAL, and they shoot very well. I use this bullet to shoot at apples at 400+yds with my AR (great fun and hard!!) and have found that my rifle likes a load of 25.9grns of TAC over a Rem 7.5 primer, in a Winchester case, with an OAL of 2.250" and a light crimp the best.You can't go wrong with a 77 SMK. Note that the NATO level max load is a full 2.0grns larger than the. ![]() ()Ħ8grn Hornady HPBT, TAC powder: Start Load: 23.4grn - Max Load: 26.0grn - Max Pressure: 61,995psi - OAL: 2.250" (Velocities are measured in a 24" 1:7 barrel so are not relevant.) ()Ħ8grn Hornady HPBT, TAC powder: Start Load: 22.0grn - Max Load: 24.0grn - Max Pressure: 54,191psi - OAL: 2.250" (Velocities are measured in a 24" 1:7 barrel so are not relevant.)ĥ.56 X 45MM NATO: 62,350psi - NATO/Mil Specs. ![]() 223 Remington: 55,000psi - Std SAAMI Commercial Specs. 223 and 5.56 chamber using TAC powder is listed below from my copy of Western Powder's V6.0 Reloading Manual: The data for the Hornady 68grn HPBT in both a. 223 for that specific bullet is different from that for Sierra's 69grn HPBT (Sierra's load data is lower) so I wouldn't just automatically use the data for a Sierra bullet. 223, don't load it to 5.56 levels as it may not be safe (no matter how short your barrel is).ĮTA: As a point of reference, I use that bullet with Ramshot's TAC powder in my 20" RRA A4 with a Wylde chamber as my rifle likes it better than even a Sierra 69grn HPBT and Varget (go figure). View QuoteIf your rifle is a 5.56 or has a Wylde chamber, you can use 5.56 load data which is higher than.
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