I'm not sure about the Hellcat but I know that the Sig p365 mags are a b**** to load compared to 43x mags so there is that there's no free lunch although most would argue that's very cheap lunch to get extra capacity so there's that side of the coin..... the whole thing is actually kind of amusing considering that many years ago Glock was the capacity efficient gun and now they're on the other side of the fence a little bit....Metal really is a wonder material