[gmd1950]

For the action screws I start at 12 in/lbs and work up, the same as for a 452.

 

[L84GLF]

On my 453, I started at 15 in-lb., and centered in at 20 in-lb.

Every weapon has its own ammo, and I guess its own torque preferences.

Play with it and see what works for your 455.

L84GLF

 

[farm boy]

Start low & work up. Mine is at 14 inch pounds.