Powder Valley ELEY Rimfire Ammunition - Choice of Champions Sinclair Int'l Midsouth Shooters Bruno Shooters' Supply Bullets.com Shooting Supplies Lapua Products at Grafs.com Click to Donate to Site
CLICK HERE to Shop at Amazon.com -- You Can Help Support the Forum.

Author Topic: CCI 450 vs. BR4 primer cup pressure tolerance  (Read 3086 times)

Offline tooter

  • Trade Count: (+6)
  • Active Member
  • ***
  • Posts: 108
I've been using CCI 450 primers in my 223AI and 6mm Dasher but just picked up some BR4s to try for group comparison. Before I load them, can anyone comment on cup thickness and pressure resistance differences between the two? Just trying to get a feel for how much I should reduce the starting loads.


Offline brxbrad

  • Trade Count: (+4)
  • Senior Member
  • ****
  • Posts: 338
CCI 450 vs. BR4 primer cup pressure tolerance
« Reply #1 on: 10:34 AM, 01/17/11 »
  • Reply
  • Here's a good article for ya.....Primer demensions are in this article


    Also a great article by German Salazar...also Includes info about br4

    « Last Edit: 10:41 AM, 01/17/11 by brxbrad »
    F-Class High Master

    Offline RonAKA

    • Trade Count: (0)
    • Ace Member
    • *****
    • Posts: 1161
    CCI 450 vs. BR4 primer cup pressure tolerance
    « Reply #2 on: 10:41 AM, 01/17/11 »
  • Reply
  • You should not have to reduce loads. The 450 is a magnum primer, while the BR-4 is a standard like the 400. It just has increased quality control (according to CCI).
    "I have not failed 10,000 times. I have successfully found 10,000 ways that will not work." - Thomas Edison

    Offline tooter

    • Trade Count: (+6)
    • Active Member
    • ***
    • Posts: 108
    CCI 450 vs. BR4 primer cup pressure tolerance
    « Reply #3 on: 11:06 AM, 01/17/11 »
  • Reply
  • Guys,
    Thanks for the responses. brxbrad, those articles gave me exactly what I was looking for.


    Recent Classifieds


    Sold Stuff Here? Donations Keep our Classifieds Free.

    Facebook LINK



    All sellers must have a complete Forum profile, including City, State, and VALID email address. All sellers must provide current true identity, phone number and address to buyer on request.

    All sellers must enable their email and private message options.

    Sellers MUST state an asking price for all listed goods, which may be supplemented by a request for offers. This site does not provide auction functionality, so there is no automated procedure to accept, qualify, or rank bids.

    All sellers must mark sold items as "SOLD". And delete your ads when the transaction is complete. A "stickie" explains how to do this.

    All sellers must disclose if the item is posted for sale elsewhere and state that the item is "subject to prior sale."

    Any seller who uses deceptive photos, lies about key components or major defects will have his advert deleted without notice and is subject to being banned from the Forum forever.


    1. Damaged or bulged barrels (unless they are sold only as salvage metal and are clearly described as "not to be used with live ammunition".)

    2. Loaded ammunition that has been loaded or reloaded by a private party (e.g. NOT factory-loaded ammo).

    3. Hand-mixed powders of any kind, or powder of unknown origin/date/burn rate.

    4. Any actions, rifles, or sound suppressors with damaged or obscured serial numbers.

    5. Scopes with broken internals or broken lenses.

    Commercial Ads
    Commercial businesses which are current, paying sponsors may post Classifieds. These shall be posted in the "Commercial Sales" area ONLY. If you sell products commercially, and are NOT paying for advertising, you are NOT allowed to post Forum classifieds. Companies in violation will be black-balled.

    Any member selling/trading any item(s) on this board who accepts monies from another member without sending out the items purchased will be permanently banned from the Forum.