I have some 158gr xtp bullets and a bunch of 2400 powder.
My Lee reloading book has data for the XTP bullets but does not list 2400 as a powder with its selection.
When I look on the Alliant website they have load data for the 2400 powder with jacketed bullets but they do not list the 158 gr XTP but rather the 158 gr Speer GDHP.
My question is can I substitute the two bullets when doing load data or is there something different with the XTP?
Here is the link to the load data.
Alliant Powder - Reloader's Guide
You can. Just work your way up the ladder and watch for pressure signs, as you would anyway. Just don't take a known 'good' set of load data, change a component, and assume it will work safely. Back off the load a little bit and work it back up.
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Absolutely you can provided they are the same weight and same basic design ... jacketed verse non-jacketed is where key differences take place a lot of times imho.
But then, as njcioff stated, work up. Start low and work your way up. Matter of fact I just recently did the exact same thing you are talking about doing with some 158 grain jsp Remington corelock scalloped pills that I picked up in a coffee can at a gun show.
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Thanks for the quick response and advice.
The Alliant website just lists the max charge, I was planning on starting at 90% of the 14.8gr listed.