Troy - I agree with your last sentence.
I reread this post after we exchanged PMs. If you are shooting ten 100 yard Benchrest competitions a year, I would venture a guess that most of your peers are shooting magazine fed vs. SST. Wind is everything ( and ability to read wind) at 100 yards, and especially with pellets.
The benefit of having a magazine fed system to quickly take advantage of favorable wind conditions for quick follow up shots trumps having to load one shot at a time.
The regular RMAC and EBR competition shooters should weigh in here, but in talking to some of them, they have a clear preference for magazines.
Tom