New IMR data Lower charge weights than the old data


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Master Blaster
November 14, 2003, 10:27 AM
Hi All,

I dont know how many of you use the IMR powders to reload, I like 4064 for 308 and 30-06.

Yesterday I went to the IMR web site, as you know hodgdon bought IMR just recently.

The reloading data has been updated on the IMR site, and they now have CUP and PSI data for rifles in a PDF format.

I noticed that my favorite .308 load 43 gr IMR 4064 and a 168 sierra HPBT match king is over pressure. The data now shows 42.5 gr 4064 as the max load. My lyman and speer manuals, which are the most recent versions show 42.5gr as a starting load and 46gr as maximum for this bullet and powder.

Thought that folks might find this interesting.

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