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Bart B. · July 23, 2021, 09:43 AM

It's not the force needed to seat bullets that's important for accuracy.

It's the force needed to push it out of the case neck. Especially when the case mouth inside edge scrapes off jacket metal unbalancing the bullet before it is shot. How many folks round off that inside edge after deburring it?

In my tests, it takes a little less force to push bullets out.

Military small arms ammo has minimum bullet pull force specs. For example, 30 caliber service ammo's specs is 60 pounds minimum, match ammo is 20 pounds minimum. For every 13 psi pressure in the case, there's about 1 pound of force on a 30 caliber bullet.

July 23, 2021, 09:43 AM	#14
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	It's not the force needed to seat bullets that's important for accuracy. It's the force needed to push it out of the case neck. Especially when the case mouth inside edge scrapes off jacket metal unbalancing the bullet before it is shot. How many folks round off that inside edge after deburring it? In my tests, it takes a little less force to push bullets out. Military small arms ammo has minimum bullet pull force specs. For example, 30 caliber service ammo's specs is 60 pounds minimum, match ammo is 20 pounds minimum. For every 13 psi pressure in the case, there's about 1 pound of force on a 30 caliber bullet. Last edited by Bart B.; July 23, 2021 at 11:03 AM.