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Old January 23, 2020, 09:18 PM   #1
JERRYS.
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Ruger LCR front sight problems....

reading the Ruger site the tritium replacement front sight will shoot 5" low at 15 yards (45 feet) with the .22lr/mag and 9mm; inferring that the .38 spl and .357 mag will be reasonably on. I could not find any data for the .327 fed mag.

based on velocity alone this makes no sense. the .22lr and .22 mag even the 9mm have velocities spreads and matches that equal the .38 spl and .357 mag (~850 fps ~1,200 fps). the .327 gun can fire loads anywhere in that range.

does anyone actually know the answer as to why the sights are not interchangeable based on the calibers the gun shoots? does anyone know of a tritium front sight that would work for the .22lr only gun? how about the .327 gun?
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Old January 23, 2020, 09:41 PM   #2
9x19
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Muzzle rise, or lack of it... the center-fire front sights are different in height (shorter), because the muzzle will begin to rise before the bullet exits the barrel. The rim-fires don't have nearly as much muzzle rise.
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Old January 23, 2020, 09:46 PM   #3
JERRYS.
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from a sub 2" bbl? how does that explain the omission of the 9mm?

Last edited by JERRYS.; January 23, 2020 at 09:51 PM.
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Old January 24, 2020, 08:37 AM   #4
Carmady
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I measured a couple of 2" LCR front sights that weren't installed.

The 38/357 sight was .250" tall (top to bottom).

The 9mm sight was .218" tall.

Don't know why the .38 and .357 would use the same height front sight, but I'd guess convenience (for Ruger).
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Old January 29, 2020, 02:20 PM   #5
two4spooky
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re: LCRx front sight height

The LCRx 3" in 22lr does come from the factory with a shorter front sight than the LCRx 3" 357. On my recently manufactured 22lr 3" I could just barely zero at 25yds. with HV ammo, standard velocity was still ~2-3" high with rear sight all the way down(edit:said previous results were with the factory installed short sight). I used the MEPRO tritium front sight(38/357 height) from Brownells. I can now get correct POA/POI for SV and HV rimfire ammo. I would go with the MEPRO version front sight for the 3" LCRx. MEPRO has a narrower 0.125" width(same as factory) vs the other thicker tritium sights I found.

Last edited by two4spooky; January 29, 2020 at 06:50 PM. Reason: clarity
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