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Brass Brand ='s different bushing size?

Pinmaster

Gunny Sergeant
Full Member
Minuteman
Jun 8, 2009
921
478
Nashville, TN
So I decided to try some Peterson 6.5c brass. Case prep included running the case through the Redding match neck die with a .288 bushing. Well, I should have taken more time...
My factory loaded Hornady ammo measures 2895 in the neck, so I use a .288 bushing with Hornady brass.
When I loaded the Peterson brass it measures .295 in the neck when loaded with the same 140 ELDM pill.
The Peterson brass is thicker than the Hornady . H is .013 and the P is .015 when I caliper the thickness of the case in the neck opening.

My question is... since I used the .288 bushing does the Peterson load have too much neck tension. .295-.288='s .007.
So
Shoot as is and use a different bushing next time...or dump the powder out of the Peterson brass and start over with a full length resized case?
 
So I decided to try some Peterson 6.5c brass. Case prep included running the case through the Redding match neck die with a .288 bushing. Well, I should have taken more time...
My factory loaded Hornady ammo measures 2895 in the neck, so I use a .288 bushing with Hornady brass.
When I loaded the Peterson brass it measures .295 in the neck when loaded with the same 140 ELDM pill.
The Peterson brass is thicker than the Hornady . H is .013 and the P is .015 when I caliper the thickness of the case in the neck opening.

My question is... since I used the .288 bushing does the Peterson load have too much neck tension. .295-.288='s .007.
So
Shoot as is and use a different bushing next time...or dump the powder out of the Peterson brass and start over with a full length resized case?


That's because there's always a difference in brass thickness between brands.. measure the new brass and go from there. You will have to either reduce or increase your powder charge depending on the brass measurements