reduced recoil slugs?

S

Super-Dave

New member
How much of penetration do you lose when you swith from 1600 fps slugs to 1300 fps slugs?

I no that the point of drop at 100 yards is significant between the two, but if your gun is properly sited for the reduced recoil shells, how much penetration is being lost switching to the reduced recoil foster slugs?
 
If the slugs themselves are identical, then relative penetration depth in the same medium will be dependant only on velocity. That is, if Slug “A” is going 15% faster than Slug “B”, it will penetrate 15% deeper. In actual practice, the higher velocity slug might (or might not) deform to a greater degree than the slower slug, which would affect penetration.

Looking at 12 Gauge, 1 Ounce, Full-Bore Foster Slug Ballistics:

Slug “A”
MV = 1,600 FPS
25 Yards = 1,388 FPS
50 Yards = 1,223 FPS
75 Yards = 1,099 FPS
100 Yards = 1,014 FPS

Slug “B”
MV = 1,300 FPS
25 Yards = 1,150 FPS
50 Yards = 1,049 FPS
75 Yards = 977 FPS
100 Yards = 923 FPS

So, at 50 Yards, Slug “A” would penetrate 16+% deeper than Slug “B”.
29.6” VS 25.4 “ in Ballistic Gelatin.

DC
 
In actual practice, the higher velocity slug might (or might not) deform to a greater degree than the slower slug, which would affect penetration.
Click to expand...

Yeah, this is the only thing. I don't think there is a mathmatical way that will accurately measure penetration of a hollow lead slug given different velocities (though I could be wrong). I would give a nod to the higher velocity, but I don't think it'll make a tremendous difference concerning penetration. Energy yes, penetration... don't really think so.
 
Soft Lead?

With soft lead thimbles (that is what a foster type slug is) the faster load will flatten out more and actually reduce penetration.
 
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