Originally Posted by hotpig
Winchester started the ball rolling with the T-Series ammo in 1998. Federal attempted in 2001 with a spin off of the Star Fire load renamed Hi Shock Two. Performance was lack luster so it was recalled.
In 2004 the HST was reintroduced but did not gain popularity until the ammo shortage of 2009 when the better known rounds were not to be found.
Finally Speer noticed a loss in market share and came out with the SB loads.
Thanks for the careful analysis!