The best information I can find has the Garand designed for the 173 grain - 7 caliber olive and a 9 degree boattail projectile, using IMR 1185 propellant (IMR 4831) . That changed to a 152 grain flat base using IMR 4895 propellant. .
This makes sense as the lighter bullet, slower powder would have the port pressure to high.
So the question for those knowledgable in all thing Garand is, was there a gas system, recoil system change required for this change of projectile?
I as as I'm starting my elk load development and this is critical information.
This makes sense as the lighter bullet, slower powder would have the port pressure to high.
So the question for those knowledgable in all thing Garand is, was there a gas system, recoil system change required for this change of projectile?
I as as I'm starting my elk load development and this is critical information.
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