BRD51 Posted March 13, 2014 Report Share Posted March 13, 2014 If I worked up a load using IMR 4320 and CCI 200 primers can I safely use the same load if I switch to CCI 250 Large Rifle Primers. I am not at max powder for the .308 load. If this were a .223 I would have no issues switching to CCI 450 primers on a load I had worked up with CCI 400 primers. Quote Link to comment Share on other sites More sharing options...
Dane Armory Posted March 13, 2014 Report Share Posted March 13, 2014 Back off 0.5 gr to 1.0 gr and work your way back up 0.1 gr at a time. Quote Link to comment Share on other sites More sharing options...
planeflyer21 Posted March 13, 2014 Report Share Posted March 13, 2014 /\/\/\/\ Yup. Did the same thing with the Winchester LP Magnum primers when there were ZERO other types of primers available. Quote Link to comment Share on other sites More sharing options...
mineralman55 Posted March 13, 2014 Report Share Posted March 13, 2014 If I worked up a load using IMR 4320 and CCI 200 primers can I safely use the same load if I switch to CCI 250 Large Rifle Primers. I am not at max powder for the .308 load. If this were a .223 I would have no issues switching to CCI 450 primers on a load I had worked up with CCI 400 primers. Out of curiosity, are you using this in an AR308? IMR4320 is a little on the slow side of the spectrum, but I'm always interested in how different powders perform in our rifles. How is the accuracy? Cycling action? Etc. Quote Link to comment Share on other sites More sharing options...
BRD51 Posted March 13, 2014 Author Report Share Posted March 13, 2014 IMR 4320 is my most accurate powder out of a LR308 18.5" barrel. I use 44.7g with a 168g bthp and CCI 200 primers and it cycles fine. It is more accurate than IMR 4895, blc2, or Win 748 of the other powders I have tried. I don't know about velocity as I have not used a chrony on this load yet. I only shoot paper at 100 yards so I don't care about velocity that much. As long as it cycles fine, and is accurate, I am gtg. At some time in the past year, I loaded 18 rounds with CCI 250 primers but I don't know which 18 rounds I loaded. That is my concern. I don't recall even purchasing these primers. I must have been so overjoyed at finding large rifle primers that I didn't see the CCI 250, only the Large Rifle Primers designation. Quote Link to comment Share on other sites More sharing options...
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