Ok. I'm confident arrow length will be 27". My understanding of the Magnock system is that it negates to some degree the effect of too weak a spine due to the way the arrow leaves the string consistently and with light pressure, reducing arrow paradox. I will either shoot a loop or use a double caliper loop type release, like the Gator Jaw, probably will try this release. The effect to the arrow should be the same as using a loop.

Based on this, am I still right on the edge of 3-49? What would go wrong if I just went with 3-60 instead? Bob Ragsdale says a little stiffer is better than a touch too weak. With a straight down the pipe over and under the nock release and a drop away rest, I can't see where the 3-60 would hurt, do you?