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m1a1driver
06-27-2010, 7:26 PM
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..

Chief-7700
06-27-2010, 7:35 PM
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.

Nodda Duma
06-27-2010, 7:48 PM
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

five.five-six
06-27-2010, 7:50 PM
they have a harder anvil so they won't slam-fire in AR-pattern rifles, it's all you should use

Nessal
06-27-2010, 9:05 PM
Never had a problem with CCI #41 or 400's. Didn't notice that it was hotter either.

m1a1driver
06-28-2010, 12:19 AM
excellent. Will give these a try. Thanks for the info.

fairfaxjim
06-28-2010, 8:08 AM
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:
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.