My comment about detents was one make or type vs. others, specifically the Hadley vs. a pivoting arm type, as in the photo of the Kelley, and one make of "Hadley" vs. others of the same design.
Obviously an iris disk like the Merit sidesteps the issue of detent reliability.
For those of us who shoot NRA BPCR events, the Merit isn't an option, as it isn't "legal" under NRA rules.
FWIW, I no longer own any brand of "Hadley".
Paul
