28 February 2021, 22:01
Phil BrousseauPressure difference between lead and jacketed bullets?
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.
01 March 2021, 15:49
Phil BrousseauSkl1 thank you for that information.
18 April 2021, 08:31
RJM.@Jax.FLPhil
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.
18 April 2021, 08:41
Lamar1422 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]
18 April 2021, 08:52
RJM.@Jax.FLLamar,
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]