RE: Pressures, .50 caliber rifles, strength of materials, PART 1
 

Hey Wolfhound,

I've just been to your website. Listen, I like you. I think of all the people who have discussed this with me recently, you have been the most sincere about about giving clean, concise, information about what you know and think about it all. I respect that.

I just wanted to suggest, that maybe, it would be to your benefit, to be careful of the claims you make about things like strength of this rifle over that. It's your site, and you are totally responsible for its content. You have, I am sure, lots of valuable information to share which doesn't get into such things. Unlike Randy, I don't see where you have anything to gain, and in my opinion, much to lose.

I've always heard that advice is worth what you pay for it. So you may not value my advice at all. But to be honest, I think I am being a far better friend to you in saying this, than Randy is in encouraging you to further his causes and interests.

Happy Hunting, Phil

RE: Pressures, .50 caliber rifles, strength of materials, PART 1
 

You see that is where you are wrong. Everything doesn't have to be equal, simply because, the bore diameters are not the same. Allow me to explain. What I chose to "make equal" was the force on the bullet. Nothing else. Just the force. And as I said, the force is only dependent on the pressure and the area of the bore. Has nothing to do with bullet weight. Nothing at all.

Now, why did I chose to makeforce equal? The answer is, because it is the forces which will determine whether the load isof sufficient energy and momentum to get the job done when hunting. We have two ways we can calculate the potential of a pressure curve to energize a projectile that it is propelling.

We can timeintegrate the Forceand calculate a summation of the impulse of the charge. If we divide that value by the weight of the projectile (in proper units of course) we will get the potential for muzzle velocity. It, of course, won't be the actualmuzzle velocity because there is friction in the bore, but we can determine precisely the Impulse, the muzzle velocity, and the impulse absorbed by friction to great precision. Which also means that we can determine the efficiency of the charge's impulse on the bullet to great precision.

Further we can calculate the potential for Muzzle Energy by displacement integrating the Force.

In both cases, it the integration of Force which is required to calculate energies and momentum. So it should be clear, I chose the appropriate thing to be equal. The force.

Happy Hunting, Phil

RE: Pressures, .50 caliber rifles, strength of materials, PART 1
 

So does one assume just because a company did not test at a pressure level of other manufactures that the rifle is not safe by the guidelines set forth by the same mfg? An assumtion to fact are two different things. I feel confident shooting my BPI weapons within the specs that came with the guns.

As far as the barrels being extruded many are in both bp and cartridge guns. I guess we can call all centerfire barrels made this way unsafe also?

Just wondering I am not getting into the thick of this because I hardly run any charge near maxi.