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Thread: Subsonic 243 ammo
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01-04-2024, 12:46 #41
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Re: Subsonic 243 ammo
I use about 3.5 gn (grain) that about 50mm L ×12 × 20 loosely fluffed. Nearly the size of my pinky. Btw we cal it Dacron but it is actually polyester hollowfibre fill which is used in duvets and jackets.
The way I hear it is that flashover with a kaboom could never be duplicated in a lab or controlled environment yet.
But the theory is that too much powder gets ignited, in a too short time like in: a horisontal rifle case, the primer flame lighting the powder from the top down instead of from the primer hole to the bullet.
I once saw somebody shoot a shot with a whole wad of toilet paper and look like confetti.
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01-04-2024, 16:47 #42
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Re: Subsonic 243 ammo
There is enough that's unknown about the phenomenon that it's a thing I'm personally not interested in pursuing without someone funding the exercise for me as my supply of rifles, fingers and eyes is constrained. The kabooms that I came across references to were not restricted to small charges of slow propellant. Not suggesting that anyone else avoid it but it's worth bearing in mind that that there are precious few if any published major manufacturer recipes for things like subsonic .243. There is bound to be a reason for that.
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02-04-2024, 07:22 #43
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Re: Subsonic 243 ammo
True, but quite possibly the reason is as simple as the fact that there are either dedicated calibers designed to shoot just about any bullet you could wish for at subsonic velocities, or ones that are very much better suited to it.
No matter what filler you use, a non-filler solution will be technically better.
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02-04-2024, 08:01 #44
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Re: Subsonic 243 ammo
Wait for another powder called "Trailboss".
It is a low density, high volume powder. Unobtanium since COVID.
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02-04-2024, 08:17 #45
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