LOL, love these threads. Load manuals for powders to bullets are worthless. Absolutely none of those powders have ever worked in a 243 Winchester.

On hand are 100 grain Partitions

Sierra told me the 90Game Changers won't stabilize in a 10 twist as did Nosler with their 100s .

Whoever at Nosler you talked to is just as worthless, look at the twist rate for 100 grain partitions in their own manual.

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Swifty