Flash holes shrinking?

[GetReal]

6mm Dasher brass by Peterson. First 2-3 firings, primers punched out easy. Now, with the same decapping pin, the primers are harder to punch out, as the decapping pin is dragging on the flash hole. Never seen that before.

Called Peterson, left a msg, no response (yet)

Primer hole is 0.059" I think. Decapping pin is maybe 0.062" and will punch primer out, but with more effort than should be needed.

Ideas?

 

[NC/Br Shooter]

New brass formula?

 

[6BRA]

What die, Redding has an undersized .059 pin

 

[RegionRat]

Any chance you used a different pin on those other cycles?
Some brass has 0.058" flash hole (1.5mm) and uses a pin that is 0.055 - 0.057" .
They call those pins extra small.
The Peterson 6 D cases I have in front of me are roughly 0.060" flash holes, and that matches what they say on their web site.

 

[piie]

Have you actually measured the flash holes before/after?

 

[jelenko]

And, just to confirm. The decapping pin is really 0.062? That would be larger than the flash hole.

 

[jackieschmidt]

We went through this years ago with the Lapua 220 Russian and 6BR brass. Everybody said, “it has a 1/16 flash hole”, when in reality Lapua was actually drilling them with a 1.5 mm drill, or around .059 inch.

American die makers, particularly Redding and Wilson, we’re using .062 decapping pins. The stuck.

Somewhere along the line they got together and Lapua actually started using a 1/16 drill and the problem went away. In the mean time, I polished a down lot of decamping pins for fellow shooters.

I have never had flash holes drink. If anything, they tend to get a little larger after numerous firings.

 

[powderbrake]

I suggest checking the decapping rod to see if it is bent.
Then reset the die with the decapping pin through the primer hole in a case before you lock down the decapping pin nut and the die nut.

 

[Gman]

We went through this years ago with the Lapua 220 Russian and 6BR brass. Everybody said, “it has a 1/16 flash hole”, when in reality Lapua was actually drilling them with a 1.5 mm drill, or around .059 inch.

American die makers, particularly Redding and Wilson, we’re using .062 decapping pins. The stuck.

Somewhere along the line they got together and Lapua actually started using a 1/16 drill and the problem went away. In the mean time, I polished a down lot of decamping pins for fellow shooters.

I have never had flash holes drink. If anything, they tend to get a little larger after numerous firings.

Lapua doesn't drill the flash holes. Kevin Thomas said that they tried it once & it didn't work out.

 

[JEFFPPC]

Do you clean your flash holes? They carbon up.

 

[Nick Caprinolo]

6mm Dasher brass by Peterson. First 2-3 firings, primers punched out easy. Now, with the same decapping pin, the primers are harder to punch out, as the decapping pin is dragging on the flash hole. Never seen that before.

Called Peterson, left a msg, no response (yet)

Primer hole is 0.059" I think. Decapping pin is maybe 0.062" and will punch primer out, but with more effort than should be needed.

Ideas?

A .062 pin will not go thru a .059 hole. I suggest you use a proper cleaning device for the primer hole.

 

[jackieschmidt]

Lapua doesn't drill the flash holes. Kevin Thomas said that they tried it once & it didn't work out.

That is what I was referring to, circa 1998.

They drilled them back then because Kaltrone Pettibone had a bulletin on Benchrest.com explaining the problem with the 1/16 pin and the .059 flash hole.

 

[Gman]

That is what I was referring to, circa 1998.

They drilled them back then because Kaltrone Pettibone had a bulletin on Benchrest.com explaining the problem with the 1/16 pin and the .059 flash hole.

My bad.

 

[Martin52]

Primer hole is 0.059" I think. Decapping pin is maybe 0.062" and will punch primer out, but with more effort than should be needed.

Ideas?

Change the pin, or, get one of these:

Mighty Armory PUA Decapping Die w/ Spring Loaded Primer Flicker

The Mighty Armory PUA Decapping Die is a universal decapping die for depriming small flash hole cases with small flash holes. Recommended for use on all single stage and turret presses. Toughest in the industry!

www.mightyarmory.com

 

[GetReal]

Change the pin, or, get one of these:

Mighty Armory PUA Decapping Die w/ Spring Loaded Primer Flicker

The Mighty Armory PUA Decapping Die is a universal decapping die for depriming small flash hole cases with small flash holes. Recommended for use on all single stage and turret presses. Toughest in the industry!

www.mightyarmory.com

I can't find any RCBS 0.057's anywhere, so thanx for posting that link.

 

[Martin52]

I can't find any 0.059's anywhere, so thanx for posting that link.

They are a very good die, I have one for Lapua palma brass.

 

[jackieschmidt]

Here is a new case out of the latest batch of Lapua 6BR and a 220 Russian as you can see, a .0625 drill shank slips right in.

Howerver Lapua is doing their flashholes, they are 1/16 inch.

 

[jackieschmidt]

By the way. Back in the ‘90’s when we had this problem with Lapua, most of us just ran a 1/16 drill through the holes.

 

[JMayo]

Bent pin

 

[Old Navy]

( All ) my dies for the small primer brass have a .058" pin. My 6.5X284 Lapua brass is large primer and came with a .062" pin.