Very educational: https://www.vihtavuori.com/tech-blog-po ... in-shapes/
POWDER GRAIN SHAPES
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- daboone
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POWDER GRAIN SHAPES
An ignorant person is one who doesn't know what you have just found out.
When setting a job up for myself it must be Idiot Proof as well, as I am a bigger idiot than most people I know, and I prove it to myself everyday.
When setting a job up for myself it must be Idiot Proof as well, as I am a bigger idiot than most people I know, and I prove it to myself everyday.
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Re: POWDER GRAIN SHAPES
I'm trying to picture the "die" that forms the multi-hole perfs.
Make smoke,
Make smoke,
Curt.......makin' smoke and raising my carbon foot print one cartridge at a time
- RBHarter
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Re: POWDER GRAIN SHAPES
Actually ........
The powder for the 5"/38 , 8"/50 and 155mm Howie have 9 holes and the kernels are big enough to readily see the light though .
Think 150+ lb bullet on 50-55 lb of powder in a 400" barrel 2750 fps on 34,500 to 35,200 psi at the breach .
Coatings and the perferations do control burn rates but also curves . It's all about surface area ........
The powder for the 5"/38 , 8"/50 and 155mm Howie have 9 holes and the kernels are big enough to readily see the light though .
Think 150+ lb bullet on 50-55 lb of powder in a 400" barrel 2750 fps on 34,500 to 35,200 psi at the breach .
Coatings and the perferations do control burn rates but also curves . It's all about surface area ........
Just a Red neck,White boy, Blue blood American.....