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Joined: May 2002
Posts: 10,554
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Campfire Outfitter
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Campfire Outfitter
P
Joined: May 2002
Posts: 10,554
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


Stupidity has its way, while its cousin, evil, runs rampant.
BP-B2

Joined: Jan 2005
Posts: 53,303
Campfire Kahuna
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Campfire Kahuna
Joined: Jan 2005
Posts: 53,303
The detent ball seating into the backside of the actual aperture is an inherent PITA with any true patterned Hadley eye cup.

A.) If properly maintained (e.g. lubricated) it attracts every dog hair and cottonwood fluff in creation,...run dry the BP gasses make short work out of the detent ball spring, and the disc winds up seized or free wheeling.

B.) The largest size one can incorporate into a Hadley is limited by the size of that detent ball,....and typically pretty damn SMALL. That can be a hateful situation in poor light, and stalking targets on a shadowy berm.

One solution is for the builder to put in a series of offset detents, in other words out at a larger radius. Certainly do-able with a good rotary table on one's mill, and a little patience.

I can tell you one thing, the Merit system requires lubrication as well, when used in a BPCR application.

GTC



Member, Clan of the Border Rats
-- “Sometimes I wonder whether the world is being run by smart people who are putting us on or by imbeciles who really mean it.”- Mark Twain





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