RB.
It was using the same arrows I just took the conventional nocks off and put the Magnocks on.
I was trying to compare apples to apples so to speak.
The way I done it was use 3 arrows with conventional nocks then shot through the crono at 5 feet noted the speed then started backing out in 10yrd increments taking note of the 3 speeds for each distance.

Then I put on the Magnock reciever and nocks and repeated the exercise over.

I still have not cut my arrows down as I am happy with the results I am getting.

I will say tho my 50yrd groups have really tighened up since switching to the Magnocks in fact I cant group tune under 50yrds without destroying arrows (which really makes my wife [:@] ) cause I then have an excuse to buy more arrows.

The arrows I used where the Gold Tip 5575 XT' s.

I have also played around with the 3555 XT' s but could not complete the above test due to a perfect heart double lung shot on the crono[:' (] and my wife wont let me buy another crono.