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Posted: 7/29/2026 3:56:46 PM EDT
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What is your go-to powder for 6.8 SPC for Speer Gold Dot 115gr bullet TIA |
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Originally Posted By Bowhntr6pt: AA2200 for me, it's been referred to many times here and other boards that it's the "go to" for the 6.8 SPC. Of course, testing will tell you what your rifle likes. It's the best if you only want to run one powder. Otherwise, H322 is better for most heavies ( 110gr and up ), with AA2200 being the best for the ones that don't respond well to H322. I did end up going to AA2200 for all my 110gr and up bullets. It was good enough in everything else I was loading above 110gr, a loss of maybe 25-30fps, but in the 110gr Accubond, it got me to 2695fps out of my ARP 16" Scout. The H322 couldn't get it past 2650fps, and that was getting hot. 110gr Hornady the H322 was faster @2725fps, but only by about 20fps, not enough to care about. 2708 or 2725fps, nobody's going to notice. AA2200 was less temp sensitive for me in this crazy southern heat. As for 100gr and down, especially 90gr TNTs, Re7 was the champ. I'm not sneezing at 2925fps from a 16", with room to grow. i had them at 2975fps, but back it down. Groups opened up a bit and it would kick enough that the muzzle rise was high enough to make follow up shots slow. 2925fps the muzzle just jumped up a little and went right back down. |
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Originally Posted By Redman556: It's the best if you only want to run one powder. Otherwise, H322 is better for most heavies ( 110gr and up ), with AA2200 being the best for the ones that don't respond well to H322. I did end up going to AA2200 for all my 110gr and up bullets. It was good enough in everything else I was loading above 110gr, a loss of maybe 25-30fps, but in the 110gr Accubond, it got me to 2695fps out of my ARP 16" Scout. The H322 couldn't get it past 2650fps, and that was getting hot. 110gr Hornady the H322 was faster @2725fps, but only by about 20fps, not enough to care about. 2708 or 2725fps, nobody's going to notice. AA2200 was less temp sensitive for me in this crazy southern heat. As for 100gr and down, especially 90gr TNTs, Re7 was the champ. I'm not sneezing at 2925fps from a 16", with room to grow. i had them at 2975fps, but back it down. Groups opened up a bit and it would kick enough that the muzzle rise was high enough to make follow up shots slow. 2925fps the muzzle just jumped up a little and went right back down. I'm not even close to your velocities. I get 2550 fps using 28.0 grains of H322 and 115 grain SMK's from a 20" barrel. The idea that someone can get to 2650 fps from a 16" barrel is scary. When 6.8 SPC came out, the accuracy load was 28.0 grains for most people, I used that data and never felt the need to change. |
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Originally Posted By borderpatrol: I'm not even close to your velocities. I get 2550 fps using 28.0 grains of H322 and 115 grain SMK's from a 20" barrel. The idea that someone can get to 2650 fps from a 16" barrel is scary. When 6.8 SPC came out, the accuracy load was 28.0 grains for most people, I used that data and never felt the need to change. Originally Posted By borderpatrol: Originally Posted By Redman556: It's the best if you only want to run one powder. Otherwise, H322 is better for most heavies ( 110gr and up ), with AA2200 being the best for the ones that don't respond well to H322. I did end up going to AA2200 for all my 110gr and up bullets. It was good enough in everything else I was loading above 110gr, a loss of maybe 25-30fps, but in the 110gr Accubond, it got me to 2695fps out of my ARP 16" Scout. The H322 couldn't get it past 2650fps, and that was getting hot. 110gr Hornady the H322 was faster @2725fps, but only by about 20fps, not enough to care about. 2708 or 2725fps, nobody's going to notice. AA2200 was less temp sensitive for me in this crazy southern heat. As for 100gr and down, especially 90gr TNTs, Re7 was the champ. I'm not sneezing at 2925fps from a 16", with room to grow. i had them at 2975fps, but back it down. Groups opened up a bit and it would kick enough that the muzzle rise was high enough to make follow up shots slow. 2925fps the muzzle just jumped up a little and went right back down. I'm not even close to your velocities. I get 2550 fps using 28.0 grains of H322 and 115 grain SMK's from a 20" barrel. The idea that someone can get to 2650 fps from a 16" barrel is scary. When 6.8 SPC came out, the accuracy load was 28.0 grains for most people, I used that data and never felt the need to change. 6.8 spc load data is all screwed up because Remington messed up the SAAMI submission thus the reason the 6.8 spc II chamber exists. Loads may seem hot but in the proper chamber are fine. 27.3gr of 2200 gets me 2517fps out of my 16" barrel. My 110gr Nosler loads were in the 2650 range too. |
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Spec II loads for spec II chambers are generally 100fps or more faster than published load maximums. Then if you load to 2.295 inches instead of 2.26 inches, you create more room, and drop pressures further, and can add more powder to gain another 100fps or so. It's a combination of things. The loads are the same pressures as the published loads in standard SPC chambers at those higher velocities due to the chamber differences, and the longer length. Bolt guns are much faster than our handloads with theirs. They load past magazine length into the 2.3++inches, loading until the projectile touches or nearly touches the rifling. Again, no pressure issues, as they've created extra space that dropped the pressure, then filled it back up with powder. @Yama Raja is the guy to talk to about that. You wouldn't believe the velocities he and others are getting, closer to .270 Winchester than to 6.8 SPC. The 6.8 out of a bolt gun is an amazing thing. All of those guns either were made with Spec II chambers, or have been reamed to Spec II, but they all have the spec II rifling profile to allow for it as well. |
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