And? Since my post you quoted has no reference to Speer Gold Dot rifle bullets I don't understand what point you're looking to make by copying my post into your post.
Federal Fusion factory ammunition is available in .243 [& .257 and .22 (.223, .224, & .22-250)] but not (yet anyway) available as component bullets in .243 (this thread relevance) or .257, or .22, consistent with my post you quoted into your post.
https://www.federalpremium.com/reloading/bullets/
The link you posted doesn't indicate any Speer Gold Dot component bullets are available at retail in .243 (or .257).
I'm pretty sure the timeline is the Speer Gold Dot rifle bullets first became available after ATK discontinued Speer Deep Curl bullets and released Federal Fusion factory loaded ammunition. I honestly don't know if Speer Gold Dot rifle bullets premiered for sale before or after ATK spun off Vista Outdoors.
So - ?????