Question
You should have know trouble with either. I shot the slick trick mags on goldtip 5575 8.2 grains which is a 400 spine 367 grains total arrow weight at 73 pounds 29 inch draw.I had pass thru's on every deer i shot out to 43 yards. I hit some pretty heavy bones as well.
With the weight of your arrows and 345 spine there will be know issues with the grizz tricks in my opinion either.
I have never shot the grizz trick but would highly recommend the Slick trick mags in your set up.
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