CAUTION: The following post (or a page linked to) includes or discusses loading data not covered by currently published sources of tested data for this cartridge (QuickLOAD or Gordon's Reloading Tool data is not professionally tested). USE AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL assumes any liability for any damage or injury resulting from the use of this information.
Early this month I posted a question about the prudence of substituting Accurate Arms 4064 for IMR 4064 - not direct charge weight substitution, just whether or not it was feasible. What raised the question was that the manufacturer lists zero data for that powder in .223 Rem, while they do list lots of data for their other powders in that caliber. The thread is at https://thefiringline.com/forums/showthread.php?t=612344
Got some good advice, for which I am grateful!
Long story short, it worked out fine. I loaded a couple of rounds very low, a few a half a grain higher, and so forth until I had some that were half a grain above the IMR 4064 load that works great in my AR spacegun. All of them shot fine, there was no excessive primer flattening, ejector marks on case heads, or any other "pressure signs" - and all the cases ejected at about 3-4 o'clock, just like the Reloder 15 and IMR 4064 loads that are "known good" in this rifle.
So, just writing to say "Thanks!" and close the loop.
Early this month I posted a question about the prudence of substituting Accurate Arms 4064 for IMR 4064 - not direct charge weight substitution, just whether or not it was feasible. What raised the question was that the manufacturer lists zero data for that powder in .223 Rem, while they do list lots of data for their other powders in that caliber. The thread is at https://thefiringline.com/forums/showthread.php?t=612344
Got some good advice, for which I am grateful!
Long story short, it worked out fine. I loaded a couple of rounds very low, a few a half a grain higher, and so forth until I had some that were half a grain above the IMR 4064 load that works great in my AR spacegun. All of them shot fine, there was no excessive primer flattening, ejector marks on case heads, or any other "pressure signs" - and all the cases ejected at about 3-4 o'clock, just like the Reloder 15 and IMR 4064 loads that are "known good" in this rifle.
So, just writing to say "Thanks!" and close the loop.