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Posted: 4/26/2010 10:19:00 AM EDT
| Whats the difference between CCI#41 and CCI450 Magnum small rifle primers? |
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#41s are Mil-Spec. A little harder than others, and are recommended for use in guns with floating firing pins.
#450s are magnum, and are a little hotter than the standard small rifle primers. They are recommended for certain powders only. CCI recommends you use them only when the load or powder calls for it. I use H335 powder, which calls for a magnum primer, so this is the one I use. The standard small rifle primer gets used for some other powders like Varget. |
| I can't be positively certain, but here's what I've heard. I hear that the #41 cups are thicker than the 400 cups, but thinner than the 450, and that the #41's priming pellet and anvil is set slightly further from the cup, to prevent slamfires. Since they are hotter than 400's, I hear they should be treated as magnum primers. |
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The CCI mil-spec primers have 3 significant characteristics:
1) They are constructed so as to reduce the possibility of a slam-fire. That's reduce, not eliminate. Proper relading/primer seating technique is still a MUST. 2) They are formulated to igniite in cold temps more reliably than std. primers. 3) They produce a flame equivalent to a Magnum primer of the corresponding size. This is all from the CCI web site. |
| According to an email response I received from CCI Technical Services the 450 and #41 share the same pellet compound and brisance. The cup thickness of .025" is identical as well. The only difference in the #41 from the 450 is there is more 'distance' between the tip of the anvil and the bottom of the cup. This adds a bit more insurance against slam-fires, but considering the track record of standard BR4 and 450 primers - and others with the same .025" cup thickness like the Rem 7 1/2 BR - this really hasn't been a problem under normal conditions and rifle maintenance. |
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