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The bottles are 25 yard out from rifle.
VIDEO
The bullet destroyed the first two bottles, went through the third bottle; was captured by the fourth bottle.
This shoot followed ideas presented by
Confederate rifleman
Couldn't help but notice the rifling marks. I've thought for some time now, that bullets fired with sabots have a higher velocity threshold than fired from barrels of their caliber. The rifling causing stress risers in the jacket which promotes expansion. Without them, the jackets can hold together better. I believe that's why bullets fired at several hundred fps above their factory rating, do so well when shot from muzzleloaders with sabots. The .40 caliber Hornady XTP's come to mind.
I'd be curious to see how these bullets expand , at the same velocity, fired from a sabot. And maybe both ways until they fail. Which survived the higher velocities? Then the question would be answered.
Just a thought.
....... what I believe is happening is when the expansion leaves the ogive and progresses down the shank/ bearing surface of the bullet. Thats when the jacket gets weakened by the rifling. Doesnt happen with a sabot. So when velocities allow expansion to progress to that point, I think the bullet will hold together better if the jacket is unmarked by the rifling. Just a thought.
This shoot the bullet was shot in a 50 rifle in a sabot. In previous shoot the bullet was shot in a 45 rifle sans sabot. To match the speed of the first bullet, which was between1650 fps, and 1700 fps, a little more powder was needed. 80 grain of 777 powder was burned in the first shoot. This shoot used 83 grain 777 powder.