Was wondering if anyone has a starting point for a 257 weatherby and 120 grain nolser part. I have a friend loading some bullets and got the 100 grain a frame and tsx working well.He has not loaded any 120 yet and i was hoping for a starting point.Thanks

Nosler.Com/load data
Hodgdon Reloading.Com

You cannot use Internet data with confidence. Depend on published data, and work up from mid-range loads. I have the best results with IMR7828 but your results may vary. My Hornady 120 loads agg in the 0.6s, the long throat seems to like bullets with a long bearing surface - bullet without boattails seem to align in the long throats better. The two best powders in my two .257s are IMR7828 and RL-22.



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In general, I agree. The Nosler online data is the same data(identical) to the latest paper manual.
I have not seen the latest Hodgdon paper manual to compare, but do have older paper H manuals that have identical load data as the online info ---from them.

As in all things internet there are trustworthy sources of information and there are those that are less than trust worthy. Check multiple sources and compare them to the manuals before you use the data. As always start low and work your load up incrementally. If you find signs of over-pressure then back the load down - you have exceeded the maximum load with those components and your rifle.