Pressure in Cast vs Jacketed Bullet Loads

[Nevada Ed]

In a way I am glad to see that the companies take all the different ways of making ammo and..............

go by the maximum pressure of the load first...........
then list the velocity of that load.

After all, SAFTY is the main goal and what ever the fps is, one just has to live with.

With ALL the bullet styles and weights out there..........
one should be able to find a load close to what will fit the bill.

 

[GyMac]

This is what it all comes down to for me: I believe that lead bullets, even if slightly over-sized, create less pressure than jacketed bullets of the same weight. Jacketed bullets are harder and, given the same pressure, they will leave the barrel slower than cast bullets which more easily move through the barrel. This is what I've believed for years and I was surprised to find that there are others who do not believe this. Maybe I'm wrong; I just thought this was an accepted fact.

 

[David R]

150 gr Saco #50 wadcutter 4.9 grains 231 1001 fps 16,800 C.U.P. Chronographs 904 from my 2"

152 lead SWC 5.0 231 +p load 934 fps 18,000 C.U.P. chronographs 804 from my 2".

All I give is the data, make your own conclusion.

I think the 38 case is kind of large for the caliber. This is why I like the 380. It holds just enough powder.

Is it not possible that different bullet types (cast, jacketed HP, etc.) will vary case volume depending on how they are seated and crimped? Volume should have a direct effect on pressure. I do a lot of reloading but I never get close to maximum powder charges so I don't think about it much. Perhaps I should.