Primer pocket sizing

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All handloading data posted on Full-Bore UK from 23/2/2021 must reference the published pressure tested data it was sourced from, posts without such verification will be removed.
Any existing data without such a reference should be treated as suspect and not used.

Use reloading information posted here at your own risk. This forum (http://www.full-bore.co.uk) is not responsible for any property damage or personal injury as a consequence of using reloading data posted here, the information is individual members findings and observations only. Always verify the load data and be absolutely sure your firearm can handle the load, especially older ones. If in doubt start low and work your way up.
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ovenpaa
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Primer pocket sizing

#1 Post by ovenpaa »

I always uniform new brass with a Sinclair International primer pocket uniformer which one of these things, it cuts the primer pocket to depth and squares off the internal corners. Usually with Lapua brass barely anything needs talking out but the last batch of Norma brass I have needs a lot taking out to get the primer to sit flush and I have resorted to a cordless drill to drive the uniformer. Does anyone else have this problem with any brass or use an alternative for uniforming? Also what do you use to clean the pocket when it has been shot, I use the uniformer again as the brass does seem to move slightly.
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spud

Re: Primer pocket sizing

#2 Post by spud »

sam as you but with the k&m version
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Re: Primer pocket sizing

#3 Post by ovenpaa »

Do you use it by hand or with a power tool and do you find some makes of case need a lot more material removing than others?
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Re: Primer pocket sizing

#4 Post by Alpha1 »

I have primer pocket reamers that fit in my lyman case trimmer just put the case in and turn the handle a couple times.
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Re: Primer pocket sizing

#5 Post by The Gun Pimp »

Don't reamer your primer pockets until after the first firing - slack primer pockets are one reason for ditching brass and when the brass is new and the pockets are at their tightest, there is always a danger of removing a bit of the sidewall with your reamer.

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spud

Re: Primer pocket sizing

#6 Post by spud »

s vince says if you are fireforming get that done before you resize primer pockets
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Re: Primer pocket sizing

#7 Post by ovenpaa »

I had to cut the pockets before firing as the primers stick out by a couple of mm otherwise on the new Norma brass, I am wary of chambering a round with the primer sticking out hence I asked.
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Re: Primer pocket sizing

#8 Post by dromia »

I swage with the RCBS tool and then lightly remove the pocket edge with a de-burr tool.
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Re: Primer pocket sizing

#9 Post by Alpha1 »

I have one of those Adam never used it still in the box I will have to try it.
Robin128

Re: Primer pocket sizing

#10 Post by Robin128 »

I always lightly deburr neck after case length trimming...inside and out

Rob
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