Interesting info on lock times:The only possible benefit I can see of having primers seated perfectly would be consistent lock times. Bear in mind here we are dealing in milliseconds when discussing lock times. A millisecond could affect of difference could affect the POA in a minor way on a unsupported rifle. When using a bipod or front rest I seriously doubt there would be any effect at all since the rifle is being held perfectly steady.
https://en.wikipedia.org/wiki/Lock_time
As compressed springs weaken over time, lock time increases over time. Primers are struck with less force.
First indicator is easily seen shooting at long ranges. Primers have less fire and wider spread and average muzzle velocity is less. Need to increase sight elevation. Watched one person replace a weak Win 70 striker spring and his 308 Win vertical spread at 1000 yards went from 2 MOA to 1 and needed about 1.5 MOA less sight elevation.
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