Re: whats the proper way to test for slam fires?
I run the bolt fairly hard also. Plus I hit the rear of the recoil lug with a hard rubber mallet and lastly I hit tang too.
If these tests don't trip the sear I call it good.
On a note, you can cause that nasty looking gouge on the bolt handle that most of you have probably seen when working the bolt too hard on the Rem 700's.
This is fairly common on the receivers that have been trued, and as a result, the bolt handle cam timing is off with the mating cam surface on the rear bridge of the receiver. If the timing has been fixed, you should be okay.
Use common sense when working the bolt, you don't have to run it as hard as you can.