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Author Topic: CCI 450 vs. BR4 primer cup pressure tolerance  (Read 2128 times)

Offline tooter

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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.

Tooter


Offline brxbrad

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CCI 450 vs. BR4 primer cup pressure tolerance
« Reply #1 on: 10:34 AM, 01/17/11 »
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  • Here's a good article for ya.....Primer demensions are in this article

    http://www.jamescalhoon.com/primers_and_pressure.php

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

    http://riflemansjournal.blogspot.com/2009/06/primers-small-rifle-primer-study.html
    « Last Edit: 10:41 AM, 01/17/11 by brxbrad »
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    Offline RonAKA

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    CCI 450 vs. BR4 primer cup pressure tolerance
    « Reply #2 on: 10:41 AM, 01/17/11 »
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  • 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

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    CCI 450 vs. BR4 primer cup pressure tolerance
    « Reply #3 on: 11:06 AM, 01/17/11 »
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  • Guys,
    Thanks for the responses. brxbrad, those articles gave me exactly what I was looking for.


     

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