I took my new S&W SW1911SC to the range today and thought I would use the spare magazine that came with the gun only to find out that it only holds 7 rounds. I have seen companies like Ed Brown only offer 7 round mags, and for Wilson you have a choice of 7 or 8 round mags. I have never had a problem with 8 round magazines from Wilson or Tripp Research. I also saw that the new Marine 1911 is spec'd with 7 round mags. Is there a real or perceived reliability issue with using 8 round mags in an 1911?