I've really wanted to try out the 100 Grain Swift S2 on game, but have yet to get a tube that likes them. Hoping the new Rock will like that pill. .429 is a bit more appealing than the .357 of the TTSX, but it really doesn't matter for short range as we're only talking .7" difference at 400. I'd still like to run them through some meat and see how they behave at that speed.