1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Primer pocket (rifle)Uniforming, yes or no?

Discussion in 'Handloading and Reloading' started by Rule3, Jan 23, 2013.

  1. Rule3

    Rule3 Well-Known Member

    I am more of a handgun shooter and never clean primer pockets let alone uniform them.

    For general range shooting (100 yard shooting is the farthest my range has)) of a 223 both bolt action heavy barrel varmint rifle and AR shooting is is worth doing anything to the primer pockets?

    Not a Match or competition shooter by any means but I do strive to be as accurate as I can be.
  2. .22-5-40

    .22-5-40 Well-Known Member

    Hello Rule3. I have been using a Whitetail solid carbide uniformer in both SR & LR for nearly 20 years now. I am not a match shooter..just like to strive for highest accuracy out of my rifles..I too am limited to 100yds. Uniforming the pockets will give a more precise feel when hand-seating primers..and of course making pocket depth identical never hurts. But even more important..even with a light start load..or a mild cast-bullet load for that matter, I have nearly always had the tool cut brass from pocket..even if said brass was uniformed until cutter stopped cutting prior to priming. I believe the cartridge brass flows in this area..and it's seldom uniform. Since I use this tool to clean pockets, any brass that flows in there will be removed at this time.
  3. 45lcshooter

    45lcshooter Well-Known Member

    Yes uniform the pockets. That would be like sticking bread on a griddle with no butter to toast it.

    Un-uniformed pocket could put more pressure on primer and primer may not seat fully.
  4. jcwit

    jcwit Well-Known Member

    Yes I would and I do.
  5. Rule3

    Rule3 Well-Known Member

    Hmm, more yea's than I expected.
    Please don't tell me you do your handgun brass also,:uhoh:
  6. rcmodel

    rcmodel Member in memoriam

    I clean primer pockets.
    I swage primer pocket crimps.
    But I don't "uniform" them, or ream flash holes, ever.

    It is simply is a waste of energy for 100 yard plinking ammo.

    Or 400 yard varmint ammo.

  7. Casefull

    Casefull Well-Known Member

    waste of time, lack of understanding. like spitting to weigh less.
  8. Walkalong

    Walkalong Moderator

    I have one, and they are nice, but I have never uniformed any primer pockets other than 6PPC. I do generally clean rifle primer pockets, but not pistol.

    It can't hurt, it might help between the ears, and only has to be done once, although brass does flow back in and if used again it will remove brass.

    Can your gun shoot the difference?
  9. exdxgxe4life

    exdxgxe4life Active Member

    You already know the answer. Should it be done...yes. Do you need to do it? no. Accuracy is about consistency. It's just one more step towards more uniformity.
  10. witchhunter

    witchhunter Well-Known Member

    Yes, always, and deburr flash holes. Turn necks only to uniform thickness. Trim to length. Chamfer mouths. Uniforming the primer pockets gives hand priming a better "feel". I use a Sinclair tool on a cordless drill.
  11. beatledog7

    beatledog7 Well-Known Member

    Logically, anything you can do to enhance the consistency (uniformity) of the ammo you build has to enhance its firing accuracy to some degree. The question then is whether any given step one can take makes enough difference to be discernible or even scientifically measurable in the firing.

    If you have gobs of time, there's probably no harm in properly doing all of the various things to brass casings that some people do in their effort to enhance accuracy. Of course, doing something improperly can result in making a piece of brass worse than factory or even unusable.

    If on the other hand, your time is limited, you have to decide how much of it you are willing to devote to exploring the arguably minuscule return on the time invested.
  12. gamestalker

    gamestalker member

    I use a primer pocket cleaning tool (RCBS) to knock any carbon left overs out, but I don't ever use a uniforming tool, and my loads will consistently shoot MOA. I'm pretty anal about my process too, but uniforming has never been a necessity from what I can tell?

  13. Hondo 60

    Hondo 60 Well-Known Member

    My answer is no.
  14. GW Staar

    GW Staar Well-Known Member

    There IS one additional reason, and why I actually do uniform pockets since I started loading on a progressive.:rolleyes:

    On my RCBS Pro 2000, I have 3 choices: 1. Try to "feel" a primer seating to the bottom of the pocket....not real easy given the weight of the ram and handle and the ample leverage. Or, 2. set the primer stop, which is supposed to seat every thing the same. Or, 3. not use it and prime with a hand or bench primer. But I love my APS primer system on the press, so 3 is out.

    I am using choice 2, but setting the press's primer stop only sets them the target depth, if the pocket depth is uniform in a batch of brass. Uniforming the pockets is the only way to get that uniformity. So since I have a Trim Mate which makes it easy, I do it. Have not noticed any problems ... I have, however, noticed I get no more high primers using that method. Floating firing pins in my .308 and .223 make even the usual 1% with slightly high primers, using method 2, unacceptable. More accuracy? Wouldn't know. I'm not a benchrester who would care.

    No! I don't uniform pistol.

    Speaking of "spit," if a benchrester thought spitting and weighing less would help on the line....you know they'd do it! :)
    Last edited: Jan 24, 2013
  15. hueyville

    hueyville Well-Known Member

    I am really obsessive. Every piece of brass that comes into inventory even mixed lot plinking cases get primer pockets uniformed and flash holes deburred. It is a one time operation that never has to be repeated. They are also trimmed to just under max OAL. The plinking ammo gets trimmed once every 5 firings as mixed cases grow at different rates. Even with mixed case ammo I see a small improvement in accuracy. Think.of all the variables it removes. Lock time due to primer face always same distance from firing pin. Even ignition as ignition source closer to same distance from powder column, exact same flame pattern coming into case due to flash holes all being same size and no burrs. Is it worth it? Not if your doing it manually but if you have a power unit for all these case prep operations it doesn't take long and adds to the fun.
  16. murf

    murf Well-Known Member

    i clean all my primer pockets......with a uniforming tool. pistol and rifle after every firing.

    kills two birds with one stone.

  17. blarby

    blarby Well-Known Member

    Yes, every one.
  18. Walkalong

    Walkalong Moderator

    Darn tootin' :)
  19. hueyville

    hueyville Well-Known Member

    If theory got out with benchrest shooters that abstaining from conjugal visitation with their wives for two weeks before a match they would build a separate bedroom near their bench....
  20. Walkalong

    Walkalong Moderator

    Where they could watch the wind flags while dosing off. ;)

Share This Page