Primer choices

[subsonic]

Back when primers were hard to get I acquired about a thousand or so CCI450 primers which I was told I could use with my 223's and my 6WOA. After some thought I desided not to use them because I didn't read any comments on this forum of people using them with these two cartridges. Because I am limited to a 200 yard range, I use about 10% or more less powder then a full load. I have become curious with the thought of using the 450 primers, any suggestions or recomendation on how to adjust my loads will be appreciated.

Thanks

 

[artbosco]

Back when primers were hard to get I acquired about a thousand or so CCI450 primers which I was told I could use with my 223's and my 6WOA. After some thought I desided not to use them because I didn't read any comments on this forum of people using them with these two cartridges. Because I am limited to a 200 yard range, I use about 10% or more less powder then a full load. I have become curious with the thought of using the 450 primers, any suggestions or recomendation on how to adjust my loads will be appreciated.

"Cases that utilize Small Rifle primers and operate at higher pressures (55,000 psi) should use CCI 450, CCI BR4, Fed 205 and Rem 7 1/2."

Here's the whole story: http://www.jamescalhoon.com/primers_and_pressure.php

Mr. Calhoon's phone number is at the bottom of the page. He's a nice guy and will entertain your questions.

 

[dmickey]

The best bet is to begin again at the starting load and work up from there.

 

[Larryh128]

I use them quite often, I really don't think that you will see much difference especially if you're below max loads to begin with.

 

[6BRinNZ]

I swapped from CCI 400 - 450s in my 6BR, while I didn't see any noticeable velocity or pressure changes, other than the 450 could go higher due to the thicker cup, the ES/SD and groupings in the ladder were quite different for the same powder.

So definitely re-work the load from the beginning. Also be wary of using primer cratering as a pressure sign in a bushed bolt face with the 450...I found the 450 really wouldn't crater but loads were right up there....the 400 would crater and be a better indicator.

 

[jbarnwell]

Speer recommends the use of the CCI 450 when ball powder is used.

 

[subsonic]

Everyone, thanks for your comments, after researching all replies the one thing that stands out the most and which is good solid advice is to start at the very beginning and work up to signs of pressure then back off about a half of a grain with whatever powder I use.

Thanks again