Perhaps the weight distribution is further towards the rear than what's required.Makes me wonder how in the world the long 208 amax stabilizes in the subsonic realm for being such a long bullet.The supersonic flight of a bullet generates a ballistic shock wave (SW). Maybe they're just not balanced right for subsonic use. Would you reccomend bumping up the charge until I hear SS cracks and then back it down slightly? Almost 6 inches between those two charge weights, where 13.5gr to 11.5 gr all were within 5 inches of vertical spread. On the paper when I went from 13.5gr to 10.5gr, I did notice that there was a large drop in POI on the paper from 11.5gr to 11.0gr. Is it possible that if my chrony is off I'm actually in the transonic velocity range and that is causing the occasional bullet to tumble? I only did the initial test with the can off to make sure they were stable and to see what the velocity numbers were reading. But I didn't shoot any of the higher velocity loads with the can on. I'm pretty sure didn't hear any ss cracks, just a woosh of air and then the impact of the bullet on the target. I'll give it a go with the 208 amaxes.the hornady round nose also looks promising. I would think if i'm getting clean holes at 10 yards without the can on I should be pretty safe to shoot with the can on? Granted this is just math and not real world flight data but I used an online stability calcualtor and for that bullet measuring at 1.279" at 1050fps it should be stable.Īny advice would be great, this is new for me and I don't want to blow off my can. I pulled the target in to 10 yards and 50 yards to see if I was tumbling with the can off and I had clean holes coming out.Ĭan looks good, I don't see any baffle strikes inside unless I'm missing some grazing of the baffles? With the can on, I get a few clean holes at 100 yards and then some that tumbled. I try to use it mostly to make sure I'm not in danger terrirtory. It is possible that my chrony isn't accurate. 11.0 gr registered 1004fps and 10.5gr registerd at 1037fps. Velocity started right about 1300fps at 13.5gr and right at 11.5 gr I hit 1114fps. All had very clean holes except the 10.5 looked like it might have started to tumble but it's hard to say. I did a ladder at 100 yards from 13.5gr down to 10.5gr with out the can on. I could probably seat the bullet deeper if I needed to. My twist rate is 1/10" Hornady 180gr btsp, Bullets seated 2.530" to ogive wich is. With 11.0gr my chrony at 5 yards from muzzle was saying 1036, 1045, and 1087. If the load won't stabilize said bullet there, it will be worst slower. When I'm looking for a sub load I start above the speed of sound and drop down. Anything less than that and your giving up distance, and total energy on target. When loading subsonic ammo your looking for a load that is just below the speed of sound, for the bullet your going to use that prints good groups on a target. Cause and effect, is a lesson unto it's self. Don't start changing things until you know the effect of the change, your making. If you throw a rock into a pond you don't see the pond rise, but the fact remains the pond level rises! You throw enough rocks and the dam will break, but in weapons and reloading that dam is right infront of your face. Originally Posted By: Frogman77gunfighter, Obviously your loads for the 208 are stabilizing ok, is there any concern about them not stabilizing since they are so long? They are shorter than normal for a 208 Amax in a 30-06 That is why I chose the 208, great on target, flys well in SS mode and is long enough to take up the 06's big case to safely do a SS loadOriginally Posted By: Frogman77Is there a minimum case capacity I shouldn't go below with the trailboss? Yes, as you don't want to join the "SEE" club, although TB is way more forgiving that other powders.
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