I do not have faith in CCI 400's within an AR, but that is definitely just private preference given that I'm sure the cup is delicate enough for use reliably in my CZ and Walther 9mm race guns.
It's genuine, that a magnum primer Could possibly be required to properly ignite SOME five.fifty six ball powders (and Other folks) in very cold circumstances ... and is part of The explanation the army makes use of them. We experienced a afcomer from Alaska who was getting this incredibly problem within the forum a several years ago. He was utilizing 335 and typical primers in bone chilling temps and obtaining problems just before he switched .... I am able to' don't forget precisely but if my memory serves that it had been colder than -20 ambient and his rifle/ammo was outside the house for a while. My older reloading manuals called for magnums any time H335 was Utilized in 223.
I'm well knowledgeable, but am keen on the technological facet of how the primer creates another POI
Quoted: Amen... I have tested BR4's vs 400s. Unquestionably no variation in my rifles. Ive analyzed really warm masses compressed hundreds with 68-77gr bullets with 8208 XBR without any primer challenges with 400s, but in the long run, finest accuracy arrived which has a reduced powder charge so its a moot issue.
Quoted: No way I would shoot warmish hundreds with 400's, I do not require the pierced primers feeding on absent at my firing pins, and they will. Unless you load em down somewhat.
“This continues to be talked over a number of instances … What has become said is All those With all the Gold Medal designation have operations which might be important to your primers regularity carried out by one of the most seasoned and precise staff members
Quoted: I doubt you should ever discover a difference in a very non match type rifle concerning "BR" primers and common primers. You're equally as prone to see as much distinction between primers basic. I Individually Will not load plinking ammo anyplace around five.56 force. In reality I discovered a sweet location about 2grs under most fellas use. I have not pierced a CCI-400 Piercing primers is not a primer concern both. I have noticed selected rifles pierce primers when none other do.
I've made use of CCI 400's For several years, by no means experienced a difficulty with pierced primers/slam fires. I have discovered them acquiring flatter when compared to the 450's or magnum primers. But its on the higher conclude of loadings near max.
Frankly, I don't think any of us even experienced pcs except it's possible a few men using an INTEL 486 for word-processing and playing "DOOM" after we found CCI four hundred's ended up unsuitable back again within the mid-ninety's. We were not acquiring our load data from Quickload. We have been utilizing hundreds encouraged by Sam Dayton - the gunsmith who assembled most of the rifles used by the staff.
wind gypsy stated: Simply because the creedmoor is often a 308 household circumstance intially designed close to a LRP, I lean toward normally using a hotter primer if utilizing SRP brass.
Quoted: Someway I ended up having a Brick of BR4 instead of four hundred's. I am now willing to load up a bunch of 55gr plinker hundreds and that's all I've left. 400 cci primers Should really I preserve the bench rest primers for precision hundreds? What 's the large difference?
I'm gonna attempt it out at lessen than 50k psi masses. I'm sure a number of you have performed greater masses than that, but I want to just take precaution, simply a preference in my behalf, I’m however searching for primers both magnum or nato spec primers.
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Again, the tests appears to increase a lot more inquiries than present answers. The one definitive summary I am able to draw from the information set thus far is this rifle seems to such cci 400 primers as the forty.eight grain load the most effective in Starline brass.