It certainly didn't impact hunting. It didn't impact shooting sports at the international or Olympic level. None of these appear to allow large capacity magazines. It probably didn't impact the silly event Cicero posted earlier, since special permits were already needed to own the fully automatic firearms used.
We should also question if a pistol event that gives a big advantage to a participant with 13 round magazine over a 7 round magazine is a well thought out sport. Restricting all participants to the same limits should result in a better competition.
So your evidence that hunters can not use high capacity magazines for hunting is? If they are not permitted, then there is a law or regulation prohibiting it. It should be easy for you to find such evidence. Show us the federal law that supports your claim.
There are no special permits at the federal level to own a machine gun in the USA. All that is required is a tax stamp and the routine ATF approval. It can be easier than getting a driver's license.
While some IPSC participants have complained about an "equipment race" in these competitions, I fail to see how rules you think are unfair has any bearing on whether or not high capacity mags are sporting or not.
Ranb