I have a S&W 629. it seems to be very finicky on the primers it will reliably ignite. currently, the only primer i can count on igniting 100% of the time is federal. i do not mind this so much, but at some place, i am going to end up with something other than my handloads. i am not sure what the issue is. it has had a trigger job, which is wonderful. i have tried tightening the mainspring tension screw as much as it will go. but i see one thing that seems quite strange to me. where the firing pin comes out of the frame, that area has a mound or cone shape to it. it constantly pushes in the primer (the primer looks kind of caved in). it seems to me that either this is normal for this model, or there is something seriously wrong in this area. this is a 629-6. i bought it used from a dealer. so i do not know its history. would some of you guys check your smith to see if your frame is like this in your gun? if this is normal, i will buy an extra strength spring and try that. but if this is not normal, it will have to go back to Smith & Wesson. i do not know how to post pictures, so at this point, this is out.