The wax in the test tube is reuseable,but after it is shot you have to melt the wax and pour it into another tube and allow it to properly cool and set up.Not very practile at the range and if I remember correctly it has to set up over night...........

Doesn't sound practical at all. Sounded too good to be true.

Alf,

No apologies necessary. You are correct, by definition, the elastic nature of the material will allow some give,while the more plastic materials "hold" the cavity created. My point being, shooting an animal with a .452" diameter hollow-pointed projectile that has a very thin wall at nearly 1900 fps is going to create a much larger cavity than a hard cast bullet.

You are correct in your statement concerning temporary wound cavity.

Thanks for the discussion and sharing your knowledge.

Penetration for a given medium is a function of bullet design, sectional density, and velocity. The Poncelet equation describes this as essentially a logarithmic relationship, which indicates a diminishing return in penetration with respect to velocity. The assertion that penetration will increase as velocity increases (with non-deforming projectiles) is true, but you reach a point where you gain only a small amount of additional penetration for a great increase in velocity. Practically speaking, there is an optimum velocity for each bullet, beyond which chamber pressures and recoil increase for very little increase in penetration. The only advantage to the greater velocity is a flatter trajectory which, over handgun ranges, may be negligible.

In the case of expanding projectiles, it is possible to increase the velocity to the point where the bullet penetrates less for further increases in velocity. The sectional density decreases at an alarming rate because the diameter (mushroom effect) increases at the direct expense of the bullet length, causing a drastic decrease in velocity with respect to time.

quote:

Originally posted by MS Hitman:

I shot a .45 ACP case as a projectile from my .475 Linebaugh. The wound channel was impressive. Based on a reasonable degree of engineering certainty, this projectile would create an extensive wound channel in a live animal.

I've been wanting to try this for awhile now, just haven't gotten around to it. Did you shoot it mouth first or base first? I would imagine that mouth forward would act like an extreme hollow point.
What kind of velocity did you get with them? Powder used? I would think that you would want a fast powder to ensure combustion continued so it wouldn't falter at the forceing cone.
From playing with Quickload it looks like you should be able to get well over 2000 fps. Don't know if it would simulate any of it correctly or not though.
Any decent accuracy at all?

I've thought of doing 9mm cases in the 375 Win also.

The cases are shot mouth first to prevent blowing out the primer and sticking the case in the barrel. I got my load from Jim Taylor and it is 12.0 grains of 700X for about 1900 fps out of my revolver. I haven't shot the load much due to the extreme difference in POI between my regular loads. I have heard accuracy is sufficient to hit silhouette chickens at 50 yards. Up close it does fine.

Way too cool. Thanks for the load info also.
How deep did you seat the case? Did you worry about sizeing the cases first? Probably wouldn't matter, but a Lee push through sizer would probably work great for it.

I bet it would make an awsome personal protection load from a 480 Alaskan pocket pistol.

No, you don't size the 45ACP case, it knocks the primer out. OAL is enough to fit into the case. I use a wooden dowel to seat the 45 case into the 475 case.

Yes, it made a spectacular wound channel in the newsprint. I would expect a similarly impressive wound channel in a varmint.

I've shot 45 acp cases out of the 480, lots of fun and a nice full caliber hole in targets. I never got steller accuracy out of them. A great way to clean out leading and just plain fun.

I almost shot an emu with this load one time, but he was way too close. It could have gotten very messy.

quote:

Originally posted by MS Hitman:
I almost shot an emu with this load one time, but he was way too close. It could have gotten very messy.

I would love to see one of these rounds loaded!

Whitworth, when are you going to do your penetration test?

John -- hopefully soon. Now I'm divided as to what medium to use......I'm open to suggestions...... jwp -- I'm sending you a PM.....