We are machining a new angle on our disco's. Have a bunch to do, but the difference is profound. We took a slicked up CZ and installed one of our disco's and tested the DA. Using our default 13# hammer spring, the average DA was 7 lbs. 12 oz.
We took the disco out, added a 3 degree angle to the face and the pull weight dropped to 6 lbs. 13 oz. The angle also changes the final break away on the DA pull making it the most linear we have ever seen.
We then followed up with 6 more builds and the spread measured from a high of 7 lbs. 2 oz. to a low of 6 lbs. 12 oz.
We are going to test the P-07/09 discos later this week to verify improvement (or not).