tcazes Posted November 11, 2015 Share Posted November 11, 2015 I noticed tonight that I can use a bore sight and dial in my cmore perfectly. Shoot a 5 shot group in the same hole in fact. But go shoot a plate rack rapidly and come back to find my dot about 4 inches high compared to the bore sight....what gives? It's a plastic, non click mounted on a egm tru sight 90 degree mount. Over a trubor with a t2 barrel and comp....what could it be? Both lock screws are cranked down as tight as possible with an L shaped allen... Link to comment Share on other sites More sharing options...
hoserdude Posted November 12, 2015 Share Posted November 12, 2015 At what distance are you bore sighting. Also. bore sighting is just to get you on paper. You should sight your gun in at 25 yards or better yet 50 yards. If you sight in at 7 or 10 yards like some people do, you will find your point of impact is much higher at distance. Parallax will get you. Link to comment Share on other sites More sharing options...
Sarge Posted November 12, 2015 Share Posted November 12, 2015 At what distance are you bore sighting. Also. bore sighting is just to get you on paper. You should sight your gun in at 25 yards or better yet 50 yards. If you sight in at 7 or 10 yards like some people do, you will find your point of impact is much higher at distance. Parallax will get you. This is pretty much true except a 90 mount puts the dot only slightly above where iron sights would be so parallax is minimized. I sighted mine in at 25 yards and it shoots right on the dot except for targets in the 5 foot range. With my old upright mount I had to be aware of shooting way low up close and pretty high at 35 yards. The 90 mount has all but eliminated that issue. But like I said, there is truth in what you said for sure. Im also curious at what range this, "5 shot group in same hole" occurred. Sounds pretty close to me. Did the OP hit all the plates perfectly? Was the dot on at that range? If so maybe the heat in the barrel is messing with the boresight gizmo? OP should keep shooting the gun and see if it ACTUALLY SHOOTS where it should be. If it is forget about the boresight tool and start shooting. Link to comment Share on other sites More sharing options...
tcazes Posted November 12, 2015 Author Share Posted November 12, 2015 I was shooting from a rest at 20 yds to get the 5 shot group. I had no problem hitting steel it's just when I went back to paper I was grouping consistently low. Put the bore sight in and surely it's back with the dot high. I mean it's not a giant problem like the difference between an alpha or delta but was just curious if anyone else's walks around so to speak... Link to comment Share on other sites More sharing options...
Sarge Posted November 12, 2015 Share Posted November 12, 2015 I mean it's not a giant problem like the difference between an alpha or delta Makes more sense now. My guess is something is wrong with the adjustment screw. Put a mark on it to see if it turns while you shoot it..Try a small dot of white out if you still have any. After that I would suspect it may be defective. Is it new? Did it work before if not? Link to comment Share on other sites More sharing options...
tcazes Posted November 12, 2015 Author Share Posted November 12, 2015 I got it on a used gun so I don't know the history of it to be honest. It had dead batteries on arrival even though it was turned off so not sure of its past. I marked the screws and they don't look to have moved any.. Link to comment Share on other sites More sharing options...
Glk21C Posted November 12, 2015 Share Posted November 12, 2015 Sight it in freestyle, not off a rest. You don't use a rest in a uspsa style match. Link to comment Share on other sites More sharing options...
tcazes Posted November 12, 2015 Author Share Posted November 12, 2015 No but you do use a rest to ensure mechanical accuracy. If you constantly chase something freehand then take freehand out of the equation. Get it right then tweak it to freestyle Link to comment Share on other sites More sharing options...
Sarge Posted November 12, 2015 Share Posted November 12, 2015 I got it on a used gun so I don't know the history of it to be honest. It had dead batteries on arrival even though it was turned off so not sure of its past. I marked the screws and they don't look to have moved any..I'll bet the sight is broken somehow. Could be bad electronics or maybe even a crack you can't see. Cmore is great to work with. Email them and describe the issue. They'll fix it cheap Link to comment Share on other sites More sharing options...
tcazes Posted November 12, 2015 Author Share Posted November 12, 2015 Sweet. Thanks bud! Link to comment Share on other sites More sharing options...
tcazes Posted November 12, 2015 Author Share Posted November 12, 2015 Went ahead and emailed them. Will update when I hear back Almost tempted to try and rtr or sts2... Link to comment Share on other sites More sharing options...
Bamboo Posted November 12, 2015 Share Posted November 12, 2015 This past year I have had two issues with two different c-mores that required a trip back to the manufacturer for repair. 1. Slightly Loose lens. I shot the steel nationals with it but it had a "wandering zero". 2. The windage adjustment screw is staked onto it's nut and that staking came loose allowing adjustment screw to wander. In both case C-more was great about doing the fixes for a very reasonable fee. In the case #2 above the very nice customer service lady asked if it was on a 90 degree mount. It wasn't when I got it, but the gun ( I bought used) was originally built with a Quinn 90 degree mount so it probably was for a little while. Also, as an FYI over tightening the set/lock screws doesn't really help and can crack the plastic frame. It is best to just give them a little snuging. If that isn't working then apply something like Vibratite to the adjustment screws, that seems to help keep the adjustments stable and reduce the backlash in the screws when adjusting. Link to comment Share on other sites More sharing options...
tcazes Posted November 12, 2015 Author Share Posted November 12, 2015 Awesome thanks for the tips! I'm putting it back on the factory mount tonight and heading back to the range. Hopefully it fixes the issue by having the blast shield Link to comment Share on other sites More sharing options...
Aircooled6racer Posted November 12, 2015 Share Posted November 12, 2015 Hello: When I adjust the elevation screw I make sure it is pushing it up. If you move it back and forth it leaves it kinda slack. So I move past it and then come back to my adjustment. In the machine world we call it taking the backlash out. Try that and see if that helps. Don't over tighten the lock screws, just snug works fine. Thanks, Eric Link to comment Share on other sites More sharing options...
tcazes Posted November 12, 2015 Author Share Posted November 12, 2015 I definitely hear ya on pulling out slack. Cmore responded and simply put, the sight was never meant to be run without a blast shield. As expected. And the necessary pricing to send it in for repair assessment or upgrade to a metal one. I'll opt to go bacj to the traditional mount and test. If still a no go....well....iv been wanting an rts2/3.. Link to comment Share on other sites More sharing options...
Sarge Posted November 12, 2015 Share Posted November 12, 2015 I definitely hear ya on pulling out slack. Cmore responded and simply put, the sight was never meant to be run without a blast shield. As expected. And the necessary pricing to send it in for repair assessment or upgrade to a metal one. I'll opt to go bacj to the traditional mount and test. If still a no go....well....iv been wanting an rts2/3.. That's kind of bogus on their part. There are probably thousands of these sights being ran without blast shields that work just fine. Link to comment Share on other sites More sharing options...
Bamboo Posted November 12, 2015 Share Posted November 12, 2015 I don't believe that part about it not being designed to run without a blast shield. The Serendipity was the original and it has no blast shield. The guns back then probably put more stress on the sight at the old power factor. Link to comment Share on other sites More sharing options...
tcazes Posted November 12, 2015 Author Share Posted November 12, 2015 Bamboo I agree completely. I also agree with the old serendipity not having it but hey that's the answer I git so gotta live with it I guess.. "Your issue is going to be with the way the sight is mounted. The sight is not designed to take the recoil mounted sideways, and that can cause your adjustments to loosen. You can send your sight in to have them tightened, but keeping the sight mounted 90 degrees you have eventually have this issue again. If you wanted to upgrade to the aluminum body, you can have a re-body done for $129.00, or you can trade it in on a new Slide Ride aluminum for $219.00." Link to comment Share on other sites More sharing options...
tcazes Posted November 12, 2015 Author Share Posted November 12, 2015 Sorry. Recoil, not blast. My mistake. Still kinda dumb imo Link to comment Share on other sites More sharing options...
MMC Posted November 12, 2015 Share Posted November 12, 2015 So what is the ideal distance to sight in a cmore. I just got a czechmate and sighted in at 20 yards, is this good? Im new to open division. Link to comment Share on other sites More sharing options...
Foxbat Posted November 12, 2015 Share Posted November 12, 2015 20 yards falls within the most common range - most people use 15 or 25, some like 50, but that is rare. You might want to do a search on this endless subject... Link to comment Share on other sites More sharing options...
BeerBaron Posted November 13, 2015 Share Posted November 13, 2015 lol, I'd love to know how the recoil is more deadly being mounted sideways vs upright! cmore is great to deal with but that one is a cracker! Link to comment Share on other sites More sharing options...
Sarge Posted November 13, 2015 Share Posted November 13, 2015 I think there is at least one other thread around here that talks about problems with side mounting cmores. I don't think this is new. But mine seems unaffected? Link to comment Share on other sites More sharing options...
tcazes Posted November 13, 2015 Author Share Posted November 13, 2015 i had two guys i shoot with locally with the same issue. mounted them back vertical and problems disappeared. go figure lol. i mounted it back the traditional way and will check it out at the range today. ideal sight in distance is the farthest average shot of your local match imo. Link to comment Share on other sites More sharing options...
gerritm Posted November 13, 2015 Share Posted November 13, 2015 Might be the way the electronics are mounted internally and supported? Sideways less support, vertical fully supported and defeats the recoil.Designed to be vertical not horizontal. gerritm Link to comment Share on other sites More sharing options...
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