Small flash holes Alpha brass
- Thread starter Lkwebb
- Start date
Old Navy
Gold $$ Contributor
That pin will work for small primers.
Just use the de-priming pin as your gauge, take the de-capping assembly out of the die and see if the pin will pass through the flash hole.
As “Old Navy” said, that pin should be just right for the flash hole.
If is too large it won’t be by much and two ways to fix the problem, one would be to use a KM Flash Hole Uniformer to ensure that the flash holes meet industry standard or you can chuck up the pin in in a drill or lathe if you have one and lightly use a mini file {very fine} or even a honing stone and remove a small amount of diameter from the pin.
I would be surprised if the flash holes are too small for your de-priming pin and if so, I personally would use the KM tool over modifying the pin….
Last edited:
Clancy
Silver $$ Contributor
.054 is good
My Lee decapping pin I use on my Alpha brass measures .069" and fits just fine into the Alpha SRP flash hole. You don't need a smaller pin.
J.J. Coe
Silver $$ Contributor
I just checked my Alpha ppc brass with gauge pins, it's on it's 4th firing. .060 is tight, .059 is a easy go.
They advertise it at .060
Hmmm??? That's interesting!
As I said above my .069 decapping pins easily fit my Alpha brass with a lot of room to spare, which supports when I read on their website that apparently shows them using .080" flash holes (one of the reasons there's been issues with piercing primers):
I wonder if they use different size flash holes for difference cases?
J.J. Coe
Silver $$ Contributor
The only Alpha brass i use is ppc, it's
.060......
It must be unique to their line up in that respect. Their Dasher, x47 Lapua, BR and BRA brass all have 2mm flash holes.
In any event, PPC or otherwise, the OP should be fine with a .054" pin
Only their ppc is the .060 all the other srp brass is.080
The 7-08 brass I have is .080"
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