SDH is right on, time and temperature is critical. Knowing when to stop the process and just how far it needs to go with a certain type of gun is what separates those who can from those
who "warp".

But as stated earlier, there are some guns that are more
susceptible to movement than others. Use an experienced hardener
that has done your kind of gun in the past (hopefully many times)
and discuss the possibility of movement. Then you can make
an informed decision.

DM

Dan May
www.classicgunstocks.com
www.millersingletrigger.com