To further the above thought:

It has been revealed by others in searches that I have found that some Model 745 pistols had errors in manufacture affecting the depth of the hole where the base of the coil extractor spring sits. I can neither confirm nor deny this allegation. I can however tell you that I own two 745's and one of them was good to go as it came to me and the other one was an extraction FAIL FAIL FAIL and after reading the possible problem with the depth of that hole, I elected to shim it.

My records indicate that I did that shimming some 1,600 to 1,700 rounds ago. Zero failures since that time. I run 200 and 230 grain plated and 200 grain LSWC. I only run handloads. I love my 745's and they are both (now!) runners.

Shim your extractor and see if you can get this pistol to run.