What would the difference in pressure be if I picked a light 125 lead bullets load and submitted the Hornady xtp jacketed hollow point? Thank you.

Phil,

Quickload says the Lee .358-125 mold lead bullet with 20 grains of Win 296 is 30,103psi and the 125 gr XTP/HP with 20 grains of Winc 296 is 36,530. HTH.

Skl1 thank you for that information.

Phil

BHN or Brinell Hardness is used to detrmine the PSI to Obturate a bullet

1422 X the BHN will give your the required PSI to obturate the bullet

MonoType is 28 BHN = 39,816 PSI
Linotype is 22 BHN = 31,284 PSI
Pure Lead is 5 BHN = 7,110 PSI

Copper varies from 35-50 BHN 35 = 49,770 psi min.
This number for copper is from a search and I can't verify it applies to thin copper jackets over lead cores

Bob in Jax

quote:

Originally posted by Phil Brousseau:
What would the difference in pressure be if I picked a light 125 lead bullets load and submitted the Hornady xtp jacketed hollow point? Thank you.

1422 is not a number for obduration.
it is the number engineers use to determine the stress level of lead.

god damn Richard LEE, and his bullshit.
[he uses it as a maximum not a minimum B.T.way]

Lamar,

Well thank you. I have been spreading bad information...
Now I have to go find the other posts and correct same.

Wish I could remember the source so I could backtrack,

Thanks none the less.

Bob in Jax

Bob

quote:

Originally posted by Lamar:
1422 is not a number for obduration.
it is the number engineers use to determine the stress level of lead.

god damn Richard LEE, and his bullshit.
[he uses it as a maximum not a minimum B.T.way]