There is still some information that I find relevant and can supply on one end, but would like to find out from anyone else that knows: Trigger pull weights.
I've heard Chris Baker of Lucky Gunner say that he installed a D spring in his PX4 Compact and it dropped the DA from 10lbs to 8lbs. I emailed him and asked if he measured it with a trigger pull gauge and did he measure it again after 4,000 rounds (where it was at that time)? He relied that he didn't actually measure. Caleb Giddings said that he put a Wilson Combat CS 12# spring in his and got an 8lb DA. I contacted him and got no reply as to whether he measured that (other things he replies to). I contacted others as well, and got no replies. Are they all assuming that because someone said it gives you a certain weight pull, but not measuring?
My point?
Springs do a thing called "relaxing". After a little bit they relax into the tension that will stay longer term. Trigger pull weight will show the progress of that relaxing or weakening through degradation. I can supply progress information on our D springs, but not on the Wilson Combat #12 spring. To me this is significant, since it might be a better alternative.
For example: The trigger pull progress for a couple of our PX4s with D springs:
My .45- Round count is the spring's:
4/19/17 @288 DA 7lbs 14oz, SA 3lbs 14oz
5/22/17 @1,853 DA 7lbs 5oz, SA 3lbs 12oz
6/1/17 @2,453 DA 6lbs 8oz, SA 3lbs 12oz
12/6/17 @14,523 DA 6lbs 8oz, SA 3lbs 12oz
Retire #1 D w/18,753 rounds 1/24/18
Our Compact 9, Round count is the spring's:
6/10/17 @200 DA 7lbs 11oz, SA 3lbs 12oz
7/8/17 @1,660 DA 7lbs 1oz, SA 3lbs 12oz
1/17/18 @8,095 DA 6lbs 8oz, SA 3lbs 14oz
Can anyone supply this kind of measuring for a Wilson Combat #12 spring, so we can see if it is initial tension or quality of metallurgy that maintains without degradation?
Attachment 23413
Also, if the WC is giving an 8lb DA and the D spring gave a 6.5lb DA for tens of thousands of rounds... that affects choice.