I had RescTech splice tested at 5183 lbs, a little more than 20% loss of strength, it broke in between two close splices, the change in diameters may have made it break earlier.
The splice used on the C-IV broke at about 92% of strength on another double braid rope.
Haven’t had the parallel strands core splice that the FireTech has, but have done other ropes and used them with no problems.
I use these instructions for the RescTech and Oplux
I stretch out the taper at mark 1 by removing 3 strands going one way before the mark and three going the other way after the mark.
The splice used on the C-IV broke at about 92% of strength on another double braid rope.
Haven’t had the parallel strands core splice that the FireTech has, but have done other ropes and used them with no problems.
I use these instructions for the RescTech and Oplux
I stretch out the taper at mark 1 by removing 3 strands going one way before the mark and three going the other way after the mark.