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Ammo and Reloading Factory Ammunition, Reloading, Components, Load Data and more.

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Old 06-27-2010, 8:26 PM
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m1a1driver m1a1driver is offline
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Default CCI No 41 primers?

Picked up a box of these today to try with my .223 reloads. any experiences with them? I've been using CCI SR primers and they have worked great. Thought i'd try these..
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Old 06-27-2010, 8:35 PM
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Quote:
Originally Posted by m1a1driver View Post
Picked up a box of these today to try with my .223 reloads. any experiences with them? I've been using CCI SR primers and they have worked great. Thought i'd try these..
CCI# 41 primers are Mil-spec small rifle primers you should not have any problems.
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Old 06-27-2010, 8:48 PM
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They provide a bigger punch than SR primers...you will want to reduce load by approx 0.5 - 1 grain (ie, work up a load again).

-Jason
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Old 06-27-2010, 8:50 PM
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they have a harder anvil so they won't slam-fire in AR-pattern rifles, it's all you should use
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Old 06-27-2010, 10:05 PM
Nessal Nessal is offline
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Never had a problem with CCI #41 or 400's. Didn't notice that it was hotter either.
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Old 06-28-2010, 1:19 AM
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excellent. Will give these a try. Thanks for the info.
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Old 06-28-2010, 9:08 AM
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CCI #41 and #34 primers are mil-spec versions of CCI's Small Rifle MAGNUM and Large Rifle MAGNUM primers.

From the CCI web page:
Quote:
CCI makes rifle primers for commercial sale that matches military sensitivity specs that reduce the chance of a slam-fire when other factors go out of control.

...

Mil-spec sensitivity
Initiator mix optimized for ball/spherical propellants
Available in large (No.34) and small (No. 41) rifle
Use the same data as CCI Magnum primers
(Bold Added)

I have noticed that some load data specs magnum primers with ball powders (Win 748 for example). If you are using extruded powder (Vargent, et. al.) then you may notice a difference with #41 vs. CCI 200 SR. Use good load development technique and you will be fine.

There is a LOT of combinations of materials available for .223/.556 - throw in all of the various barrel/chamber combinations and you have way more. Reloading allows you to fine tune all of those variables, and I recommend developing loads for each rifle, rather than going with a "one size fits all" formula.

I have used CCI 200 with Varget, CCI 250 and #41/.556 with Win 748 and all have worked fine. I have seen a LOT of .223/.556 reloads through AR-15 style rifles using standard hardness primers without any problems. Having said that, I do use the #34 when available for loading ball powder for my AR rifles.
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Last edited by fairfaxjim; 06-28-2010 at 9:17 AM..
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