Quote:
Originally Posted by Dave T
To reinforce what S-P was saying about the loading manuals, I was recently comparing the 44 Special loads from an old (1970) Lyman manual to a new (2009 printing) Lyman Pistol & Revolver manual. The starting load in 1970 for a 245g cast bullet and 2400 powder was 12g. Fast forward to 2009 and 12g of 2400 with the same 245g cast bullet is the Maximum load....
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The powders made today may not be as potent as the powder thirty 40 years ago.
In the same type of powder pressure curves can vary quite a bit from one batch to another, much less decades apart.
Manufacturing processes have changed and late, current reloading data should be used.