Mat Price Posted September 8, 2011 Share Posted September 8, 2011 ok I have been having weird accurcey issues with one of my trubor open guns. Gun is a short wide sti frame and trubor t-2 barrel in 9mm. I have a cameron mount on the gun and I been adjusting load ( 5.2 of auto comp/1.165 steel 7.1 AC/1.165 both with 124 JHP) This load shoots one hole @ 10 yards out of my other trubor, but accuracy comes and goes with this one. well tonight I was having a frustrating sighting session when i started having odd malfunctions I never have Double feeds, FTF). I noticed the grip screws were loose enough I could turn them with my fingers. So i tightened them down and put blue lock tight on them. I am waiting till tomorrow to shoot it again and see what i get. But can loose grip screws cause poor groups like 3 inches @ 15 yards and frequent lose of zero? I have had to tighten them before but they have never been this loose. Just wondering i mean I will know for sure tomorrow once the lock tight has set for sure. Link to comment Share on other sites More sharing options...
Service Desk Posted September 8, 2011 Share Posted September 8, 2011 On my SVI Action Pistol the accuracy goes off when the grip screws are loose - however the groups are like 3 inches at 50 yards ! Sounds more like the projectile is hitting the compensator baffles - EGW & Nowlin make great bore-piloted reamers for fixing the problem. I have the Nowlin and use it regularly to remove lead buildup after shooting a couple of thousand lead boolits. Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted September 8, 2011 Share Posted September 8, 2011 can loose grip screws cause poor groups like 3 inches @ 15 yards and frequent lose of zero? I had exactly the same problem - the grip screws were loose, and I had to keep resighting the gun, sometimes it didn't even last an entire match:( You should be fine now that you'd loc-tited them - just keep checking them every once in a while. If this happens again, and the grip screws are tight - check all your other screws. Good luck, Jack Link to comment Share on other sites More sharing options...
Mat Price Posted September 8, 2011 Author Share Posted September 8, 2011 thats Exactly what I am having jack. somtimes zero wont last from the time i start sighting to i stop. hope thats the deal. If not I guess i will send it to EGW for alighment. I hear they do it for like ten bucks. Link to comment Share on other sites More sharing options...
CocoBolo Posted September 8, 2011 Share Posted September 8, 2011 When boolits are hitting the comp, you may get 3 or 4 good hits and then one that is way off. Look in the comp after shooting, if you see little shiney flakes in the comp those are pieces of bullet jacket, also if you look close at the holes in the comp walls you may notice a faint shiney or copper colored line, in the direction bullets travel. If you have this then you need to align ream the comp. Link to comment Share on other sites More sharing options...
Mat Price Posted September 8, 2011 Author Share Posted September 8, 2011 thanks ron, I will flush the comp with some solvent today and keep an eye out for frosted flakes! Link to comment Share on other sites More sharing options...
Mat Price Posted September 8, 2011 Author Share Posted September 8, 2011 No flakes and a pretty good group. shot 3 spotters and 5 shot group @ 20 yards. So i Think I have solved my issue Link to comment Share on other sites More sharing options...
Dwain C. Baer Posted September 8, 2011 Share Posted September 8, 2011 Nice target...looks like everything is resolved Link to comment Share on other sites More sharing options...
Mat Price Posted September 15, 2011 Author Share Posted September 15, 2011 yep and since then i have shoot match and lots of practice rounds still holding zero Link to comment Share on other sites More sharing options...
calishootr Posted September 17, 2011 Share Posted September 17, 2011 nice to see the screws may have beenthe culprit, if it wasnt fixed i was going to toss out there, yrs ago i had some POI problems with mine and it turned out i had a cracked frame...only visable when a full mag was put in and put pressure on the frame did i seethe point of separation.... Link to comment Share on other sites More sharing options...
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