Skip to main content
Thank you for your patience as we work through our high volume of requests. If you need assistance with 2FA, please provide the correct phone number in your ticket request so we can assist quicker.
Help Center Community Shop

Seating dome shaped primers

Ambrose
I have 1,250 Alcan large rifle primers that were given to me. They are dome shaped--not flat like todays convential primers. I remember that the old Herter's press that I started with (long since given away) had both flat and concave primer posts for both types. I have several priming systems; RCBS, Hornady, Lee. Does any firm make a priming post for these primers?
0

Comments

8 comments

Date Votes
  • Rocky Raab
    Not any more, they don't. I also have a good quantity of domed primers. I seat them with a now-standard flat punch, which simply flattens the domed part. Be sure to not apply too much pressure; you can't seat them as firmly as regular primers. A hand primer is ideal. Just press them in until you barely feel a bit of added resistance.

    Haven't had a misfire yet.
    0
  • Tailgunner1954
    My old RCBS press came with 4 punches, small and large in flat and domed. I still have them in my reloading drawer.
    Know anyone that has a box of older press parts?
    0
  • Pistollero1050
    I got all kinds of old parts for a Lyman All American Turret press what do you need. Also on subject, like what has already been said, be gentle with a hand primer, seat them fully and make sure that the mouth of the carrtridge case is pointing away from your face so if you do get a adc their is no danger just a little noise.
    0
  • jonk
    Some time back I got a load of 1930s vintage 30-06 brass, some of which I wanted to turn in to 8mm Mauser. I didn't want to resize it with the primers in, worried that the lube might get into the primers and ruin them.

    So I punched 'em out with a universal decapper and later re-used them (they all went bang).

    The idea that I should use a concave priming ram never entered my mind, I never heard of them- and yes, they were rounded primers.

    They all seated and went bang just fine.
    0
  • cbyerly
    Just use your Dremel tool with a grinder or cutoff disc and dish your priming post.
    0
  • 5mmgunguy
    Ambrose I have both a small and large concave priming post for a RCBS press that has the priming arm. Both are brand new for the cost of shipping ($2) they are yours.
    0
  • Ambrose
    5mmgunguy: You've got mail.
    0
  • 5mmgunguy
    Got it and sent a reply.
    0

Please sign in to leave a comment.

Recent Activity

Didn’t find what you’re looking for?