BoyGlock Posted July 18, 2012 Share Posted July 18, 2012 (edited) My set up: Glock 17 Gen 3 KKM drop in barrel Carver Mount SJC 11-port comp 9mm major PF @ 165, 200 rnds/week ave. 13# ISMI rec Spring on tungsten g. rod Vanek GM trigger w/ Gk OEM striker spring My Problem: In about 6 months usage, it broke 3 optical sights, 1 CMore sts separated lens from frame, 1 sts dot gone on auto mode, 1 Aimpoint Micro red dot gone. What causes these failures in optics? think its too much coincidence to blame the sights. is it the gun platform, or is this normal maintenance cost? am I missing something? Im in the process of testing and investigating but I think lots of experienced shooters here can give light to this disturbing trend TIA Edited July 18, 2012 by BoyGlock Link to comment Share on other sites More sharing options...
ormondopen Posted July 18, 2012 Share Posted July 18, 2012 like you I had bad luck with the micro dots on my open glocks as well as the STI platform. I chalked it up to the sights and went to full size optics, have not had an issue since, (knock on wood). Link to comment Share on other sites More sharing options...
BoyGlock Posted July 20, 2012 Author Share Posted July 20, 2012 Inspite of mentioning STI platform, I am wondering if the Plastic frame of glocks flexing in recoil does more harm on the optics than metal ones. But to my mind this is not logical. Plastic frames flexing in recoil transmit less stress to frame mounted optics than does metal frames being more rigid, imo. Link to comment Share on other sites More sharing options...
BoyGlock Posted July 24, 2012 Author Share Posted July 24, 2012 200+ views and just 1 comment, hah! Anyway, I replaced my optics and mount w/ a carver hunter model mount and my old CMore slide ride, mounted on the mount's forwardmost position. This way I dont need to supertune the gun's ejection to make it reliable, my own presumption of course. In this set up, my initial group shots were very good, 2" at 20y 5-shot groups were easy. But at 30+ rounds, the group suddenly scattered to 8-12" w/ majority of shots at 2 oclock of POA. I shot about 50 more rounds thinking it was me not the gun, but the spread was the same. I inspected the optics, mount and the gun and found nothing to suspect. After a few days, I shot it again w/o altering anything, and the group was back to its initial 2" size. After 300+ rnds to date, I had checked zero and groups, still good. But Im not comfortable w/ this. What if in a middle of a match, the gun suddenly decided to shoot shotgun-like hits again? Need to find the culprit soon. just sharin' the fun of shooting open Link to comment Share on other sites More sharing options...
Rick88 Posted July 24, 2012 Share Posted July 24, 2012 Wish I had an answer for you, I can understand the micro dots going bad but the spread in groups is very odd even if your slideride had a brain fart something just doesnt add up. Link to comment Share on other sites More sharing options...
fosters3 Posted July 24, 2012 Share Posted July 24, 2012 My set up: Glock 17 Gen 3 KKM drop in barrel Carver Mount SJC 11-port comp 9mm major PF @ 165, 200 rnds/week ave. 13# ISMI rec Spring on tungsten g. rod Vanek GM trigger w/ Gk OEM striker spring My Problem: In about 6 months usage, it broke 3 optical sights, 1 CMore sts separated lens from frame, 1 sts dot gone on auto mode, 1 Aimpoint Micro red dot gone. What causes these failures in optics? think its too much coincidence to blame the sights. is it the gun platform, or is this normal maintenance cost? am I missing something? Im in the process of testing and investigating but I think lots of experienced shooters here can give light to this disturbing trend TIA My 2 cents, I had a carver mount, but within the first 200-300 rounds I found my cmore to be farther forward than my SJC mount. The Carver mount enabled the optic to get residue on it and with my SJC I never have to wipe it off. Could be coincidend.. Could be nothing, but I would try an SJC and see if you see an issue. Link to comment Share on other sites More sharing options...
malagamarksman Posted July 26, 2012 Share Posted July 26, 2012 That sounds expensive and very unlucky. I have a CMORE STS and a Burris Fastfire 2. Originally I had the STS mounted in the dovetail on the Glock 17 slide. I shot it that way for about a year with no problems. Until one day in the middle of a stage it flew off the mount and hit me on the head. So that setup went out of the window. I then fitted a frame mount from IGB in Austria and put the STS on that. The IGB mount is similar to the Carver mount. No problems at all to date. The Burris was always frame mounted and has been trouble free as well. These mini optics are well made and seem quite resilient. I think you just may have been very unlucky ? Link to comment Share on other sites More sharing options...
rangerguy Posted July 26, 2012 Share Posted July 26, 2012 I have a burris ff2 mounted on the dovetail on my glock 22 open gun and after 3000plus rounds I still have not had to zero it again. Next time you go out and shoot it mark your screws to see if there moving, mount and adjustment screws. Link to comment Share on other sites More sharing options...
BoyGlock Posted July 30, 2012 Author Share Posted July 30, 2012 Think I have found the problem in the other "woes"- that of the good-bad-good groupings. The pistol shot bad groups the second time and I was using my reloaded rnds w/ very hard-to-seat primers. No matter how hard and repeatedly I pushed the reloader handle of my 550 to seat these primers, there were still a lot w/c protrudes a bit from the case head. After some time thinking and looking for the problem, I got another box of reloads w/ different brand primers w/c I regularly use and has no problem in seating. The group immediately went good. I suspect the protruding primers causes the rounds to not rest flush on the breach face and hence a bit askew in the chamber. Or causing a wrong headspace. I suspect the rounds fired in this position made the bullet start at an angle from the line of bore thus causing the erratic POI... will test this more in the coming days and hope its not just a coincidence. What doyou all think? Link to comment Share on other sites More sharing options...
Glockman1000 Posted July 30, 2012 Share Posted July 30, 2012 Have you tried some factory ammo? It would be a good idea to have some sort of control medium to verify your results. Maybe try 2 different brands of factory to be sure. Link to comment Share on other sites More sharing options...
BoyGlock Posted July 31, 2012 Author Share Posted July 31, 2012 Have you tried some factory ammo? It would be a good idea to have some sort of control medium to verify your results. Maybe try 2 different brands of factory to be sure. Thats a good idea but mine is 9mm maj so no factory ammo. Thanks Link to comment Share on other sites More sharing options...
BoyGlock Posted August 3, 2012 Author Share Posted August 3, 2012 Think I have found the problem in the other "woes"- that of the good-bad-good groupings. The pistol shot bad groups the second time and I was using my reloaded rnds w/ very hard-to-seat primers. No matter how hard and repeatedly I pushed the reloader handle of my 550 to seat these primers, there were still a lot w/c protrudes a bit from the case head. After some time thinking and looking for the problem, I got another box of reloads w/ different brand primers w/c I regularly use and has no problem in seating. The group immediately went good. I suspect the protruding primers causes the rounds to not rest flush on the breach face and hence a bit askew in the chamber. Or causing a wrong headspace. I suspect the rounds fired in this position made the bullet start at an angle from the line of bore thus causing the erratic POI... will test this more in the coming days and hope its not just a coincidence. What doyou all think? Ok, everything was back to shotgun patterning. It was just a coincidence. After lots of rounds this afternoon, and lots of frustrations, I noticed a screw on the right side of the slideride cmore had backed out about 1mm protruding from the cmore body. Its the small headless bolt at the rear of the elev. locking screw. The closest term for it is the "guide screw" per this forum member XRe's blog. The cmore site had nothing on it. I tightened this screw and the group shrunk to acceptable size. I fired 20+ rounds more in 3-shot groups and the zero held. I was forced to end the bench shooting as it was already dusk, making it difficult to aim precisely and consisently. I applied a little red loctite on both ends of the screw and let it seep thru. Hope this is now the real cure. Has anybody met this type of problem? How does this screw affect the zero of the dot? Is this the real culprit? Link to comment Share on other sites More sharing options...
greatlakes08 Posted August 4, 2012 Share Posted August 4, 2012 Boy Glock, I am thinking of purchasing a glock open gun and had a few questions. Will your gun not cycle factory 9mm due to your spring setup or do you just not want to run it? I also thought the advantage of running the STS with the forward carver amount allowed you to use factory ammo because it did not impede the ejection port? Have you tried some factory ammo? It would be a good idea to have some sort of control medium to verify your results. Maybe try 2 different brands of factory to be sure. Thats a good idea but mine is 9mm maj so no factory ammo. Thanks Link to comment Share on other sites More sharing options...
Henry625 Posted August 4, 2012 Share Posted August 4, 2012 I have a Glock 17 Open pistol, I had a micro dot on it at first. I was shooting major PF loads, the dot would not hold zero. Went to a SJC sideways mount with full size C-More, dot holds zero, but my groups were all over the place. Reduced my load to Minor PF, WOW! The group size was reduced dramatically. I have a Lone wolf barrel with a Carver Major PF comp. I think that the barrel/ bullet combination I am using is not conducive to accuracy at major power factor velocities. I learned one thing, there is a big shock wave that transmits through a Glock while shooting Major PF loads. I just concentrate on shooting as many "A"'s on the targets as I can and try not to get caught up in the "gaming" of the courses. All "A" zones are 5 points no matter what PF. Oh, my Glock will shoot factory loads that are minor PF, especially Winchester White Box. Link to comment Share on other sites More sharing options...
BoyGlock Posted August 7, 2012 Author Share Posted August 7, 2012 Boy Glock, I am thinking of purchasing a glock open gun and had a few questions. Will your gun not cycle factory 9mm due to your spring setup or do you just not want to run it? I also thought the advantage of running the STS with the forward carver amount allowed you to use factory ammo because it did not impede the ejection port? Have you tried some factory ammo? It would be a good idea to have some sort of control medium to verify your results. Maybe try 2 different brands of factory to be sure. Thats a good idea but mine is 9mm maj so no factory ammo. Thanks Hi, W/ 13# ISMI rec spring, it wont run on minor loads. I haven't used factory loads. I tested 9mm loads for IPSC Prod div. Even w/ 11#, its not reliable. And yes, I dont want to use minor ammo. I always practice w/ what I use in the match w/c is IPSC major ammo. The carver mount w/ the mini rail for STS is clear of the ejection path so its one less problem in the reliability of the gun. So, yes its 99% reliable as the stock glock. W/ my loss of the micros, I reverted to my old CMore slideride on a Carver Hunter mount w/ the rail in the most-forward position to stay clear of the ejection. The hunter also sets the sight higher than the Competition model w/c means more space for ejection. And so far its very reliable w/ minimal ejection tuning. All these w/ 9mm maj ammo btw. If setting up for minor ammo, I think its better to use the comps designed for this load. Carver has it. Link to comment Share on other sites More sharing options...
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