Old and new powder differences

by woody, Tuesday, April 02, 2013, 17:14 (4256 days ago)

I have been loading cast bullets in several rifles lately. Mainly 30-30 and 22 hornet. I have an older lyman cast manual and another lyman loading manual. Itnis the best source of cast data. Just a quick question. How does older reloading data compare to modern? Powder charges,powder burning rates etc. I know this has been asked and talked about quite a bit but just want to ask. Mainly looking at 4227,2400,4198,748. Etc. Thanks.