Go | New | Find | Notify | Tools | Reply |
One of Us |
I ahve noticed often in the recipes for relaoding the primer is mentioned specifically. I noticed this morong in my reloading it was with federal primers, and some with cci primers. I didnt notice until I had realoded and I put them all together with CCI small rifle primers (reloading 223) My question is , Is there enought difference to cause any issues. i reload in the middle of the recommended charge, Nothing real hot , and I avoid the lower side also.I dont have enought experience yet to know what i can get away with powder charge wise So for now i am staying on the safe side. Will using CCI instead of Federal primers cause any problems? Most people are link slinkies, Basically useless but fun to push down the stairs. | ||
|
One of Us |
I personally would not worry about it unless you foolishly started out at the max level. I know there are slight differences but when I shoot the same powder charge with different primers the velocities sure don't vary all that much. Usually well within standard deviation. | |||
|
one of us |
Except with the very smallest of cases (.22 Hornet, perhaps) any difference in primer briscience, even between so-called "magnum" primers and "standard" primers, is of no significant effect on the safety of the load. However, that is NOT to say that some primers may not provide superior consistency and accuracy as compared to others with the same load. | |||
|
One of Us |
as far as I'm concerned the only time I pay attention to the stated primer in the recipe is in loading high pressure shotshells. /////////////////////////////////////////////////////////////////////////// "Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery." Winston Churchill | |||
|
one of us |
Here's something that I posted on another site. An informal comparison of primers. I didn't do this as a test but it worked out that way. The claim is that "Match" or "Benchrest" primers are more consistent which should translate to smaller groups especially at long range. I had loaded up a bunch of test loads for my 6.5x284 with H4350 and CCI 300 (standard large rifle) primers. I had forgotten that I wanted to use the Federal Gold Medal Match primers in this gun so instead of pulling all of these loads down and trying to deprime them, I loaded identical loads with the Federal Match primers. These loads were done right after I finished the previous group of loads on the the same match prepped brass, the same powder measure, die settings, etc. I measured the velocity of every shot and the group size and let my Pact chronograph calculate the Standard Deviation or SD. When shooting, I alternated loads by weight of powder and cleaned with a dry nylon brush between each load. I also completely cleaned the barrel every 20 rounds and fired a couple of fouling shots before measuring the next groups. 6.5x284 Lapua Brass 142 grain SMK...................H4350____.007 off lands Federal Match Primers______________________CCI LR Primers Powder__Velocity__SD_____ Group____________Powder__Velocity_SD_____Group 44.5____ 2685____6.8_____ 0.72____________44.5____2682____12.2____0.92 44.7____ 2695____7.4_____1.3______________44.7____2690____8.8_____1.1 45.2____ 2709____3.9_____1.2______________45.2____2712____11.6____1.2 45.5____ 2737____11______0.85_____________45.5____2726____6_______0.9 45.7____ 2736____6.2_____0.5______________45.7____2738____11.8____0.75 46______2767____4.5_____ 0.5______________46_____2745____13.8____1 46.2____ 2775____5.5_____ 0.7_____________46.2____2768____8.9______0.8 46.5____ 2791____3.9_____ 0.85____________46.5____2785____16______1.1 47______2818____5_______0.75_____________47_____2808____10.8____0.82 47.3____ 2804____4.5_____ 0.72____________47.3____2834____9.9_____0.66 47.6____ 2840____9_______0.316____________47.6___2843____21.8_____0.85 48______2874____10.8____ 0.41_____________48_____2866____16.7____0.9 _______________SD_______Group___________________________SD_____Group Average_________6.54_____0.73____________________________12.36___0.92 Conclusion: In my very limited test (using this one gun and lots of primers) there was a difference in standard deviation (89%) and group sizes (26%). This testing is not a scientific proof of any kind for a variety of reasons including having too small a sample size but I also used primers made by two different manufacturers and the differences could easily be from the manufacturer's tolerances themselves. Frank "I don't know what there is about buffalo that frightens me so.....He looks like he hates you personally. He looks like you owe him money." - Robert Ruark, Horn of the Hunter, 1953 NRA Life, SAF Life, CRPA Life, DRSS lite | |||
|
One of Us |
I am not to the point of being down to one powder. I am just getting started and trying to get an idea of bullet weight and powder. Once I get a little more info i will try different primers and different types of bullets. Thanks for all the info , doesnt look like it will be an issue in safety, just might not be as accurate. Most people are link slinkies, Basically useless but fun to push down the stairs. | |||
|
One of Us |
Another interesting thing; There is not much of a relation between SD and accuracy. So much for that one. Good luck! | |||
|
One of Us |
John Barness recently published some pressure tests in either Rifle or Handloader that reveal shifts of 10,000 plus PSI in loads, the variable being the primers with the same powder loading. You will have to look it up but the CCI 200 was one of the mildest I think. But, 10K PSI is a real problem at max loads. He had 5xK PSI load and a 70K PSI load just by changing the primer. It is worth finding and reading. There is some information on the net too that can be found by searching. "The liberty enjoyed by the people of these states of worshiping Almighty God agreeably to their conscience, is not only among the choicest of their blessings, but also of their rights." ~George Washington - 1789 | |||
|
One of Us |
Switching primer brands is NOT going to blow up your rifle, or anything like that! BUT if you work up a real accurate load with one brand then start using another make, the results might not be as good as far as accuracy is concerned. "Bitte, trinks du nicht das Wasser. Dahin haben die Kuhen gesheissen." | |||
|
Powered by Social Strata |
Please Wait. Your request is being processed... |
Visit our on-line store for AR Memorabilia