Al Capizzo Posted December 5, 2006 Share Posted December 5, 2006 I've got a Caspian open gun, clark barrel, screw on cone comp (Brazos) that I bought used about a year ago. I've really liked this gun, but the last month or so its accuracy has been very erratic. I'm also seeing some keyhole type holes in paper. To keep this brief, I could shoot the 50 yd stds for Area 4 at the start of my practice session. 400 rounds later, I could not put a round on the target, anywhere, shooting from a rest. I checked all the scope mount screws and I sighted in again, for a bench. 2-A's almost touching, 3 rounds WAY down in the right D-zone, and a couple rounds not even on the target. I changed the scope out and shot a few more groups and it seemed like I was o.k. Shooting a 32 round stage at A4, the first 26 rounds went o.k., including 2 small poppers, but the last port was two 8" plates (maybe 12-15 yds) which then activated two paper. I shot 12 at one plate and could not hit it. The rest of the match I could have some targets with nice tight A- hits and then some with holes 18" apart. And a lot of tumbling bullets. Some of you may remember my grumbling after Open nats, I was really bewildered. Some stages were ok, but on another the hits weren't anywhere near where I'd called them. Whats going on here? Link to comment Share on other sites More sharing options...
Flexmoney Posted December 5, 2006 Share Posted December 5, 2006 Bullets could be hitting the comp. Are you shooting plated or jacketed? Could be a broken part (link) or a cracked frame somewhere. Tear it down, and get your spy glass out. Link to comment Share on other sites More sharing options...
Matt Cheely Posted December 5, 2006 Share Posted December 5, 2006 What's your round count? Barrel shot out and loosing velocity? Check everything for a crack, slide, frame, slide stop, scope mount, everything. Scope diode or lens loose? Just thinking out loud... Link to comment Share on other sites More sharing options...
BSeevers Posted December 5, 2006 Share Posted December 5, 2006 I agree and think its either "comp droopies" They crack and droop or the scope is broken. Strip it down completely and get a bright light. Hold it at angles to check for cracks. If you can borrow a friends scope to test before that would work too. Link to comment Share on other sites More sharing options...
Dan Sierpina Posted December 5, 2006 Share Posted December 5, 2006 If the bullet is hitting the comp due to a crack, you can actually see the land and groove marks from the bullet. If you're shooting plated bullets, try true jacketed bullets. When I tried plated bullets accuracy was erratic. Link to comment Share on other sites More sharing options...
Al Capizzo Posted December 5, 2006 Author Share Posted December 5, 2006 Thanks for the suggestions. I did put a new scope on before A4, thats when I thought it was o.k. Hadn't thought about frame cracks, have to look at that. I'm shooting Montana Gold jhp's. Anything else? Link to comment Share on other sites More sharing options...
XRe Posted December 5, 2006 Share Posted December 5, 2006 Al, they've already given you everything - look closely at the comp baffles... check for cracks, etc, etc... Also - is there any buildup within the comp? Even shooting JHPs, you'll get some buildup. If the buildup accumulates enough, it can actually rub the bullet, too... Link to comment Share on other sites More sharing options...
L9X25 Posted December 5, 2006 Share Posted December 5, 2006 If your gun is able to pass all the tests listed above, you might try some .356 ot .357 projectiles and see how that affects the results. If you are having a situation with marginal projectile/barrel fit, switching to the larger projectile will often resolve the problem for a while. Link to comment Share on other sites More sharing options...
Alan Meek Posted December 5, 2006 Share Posted December 5, 2006 Al, What caliber and other load information? Link to comment Share on other sites More sharing options...
BSeevers Posted December 5, 2006 Share Posted December 5, 2006 I get the impression from the description it worked fine for a long time and it just now having problems. Unless you changed ammo the ammo shouldnt be an issue. I still think broken/cracked part. Get out the maglight. Look inside the barrel you can see an eroded one. Front of the chamber area is most important. Cracked barrel lugs could cause this but they should eventually break by now. Did you change anything except the scope? PS Check your press. I have had a die loosen and cost me a match loading poor ammo with no taper crimp Link to comment Share on other sites More sharing options...
ipscbob Posted December 5, 2006 Share Posted December 5, 2006 Had this exact same behavior with my open gun. Turned out that the locktite used to hold on the comp had degraded and the comp was clocking. Bullets were hitting the comp intermittently. Check to see if your compensator is loose as well. Link to comment Share on other sites More sharing options...
Al Capizzo Posted December 5, 2006 Author Share Posted December 5, 2006 As a matter of fact the comp is loose, though it doesn't move a lot. It will eventually move maybe 1/8 or less of a turn. I don't see signs of bullets hitting the comp, but it could be I don't know what I'm looking for. This is the first open gun I've owned. Never the less, I've taken comp off the barrel and I'll re set it this week. Luckily there was just a thread on this subject Link to comment Share on other sites More sharing options...
old john Posted December 6, 2006 Share Posted December 6, 2006 If your comp moves ten Thousandths or less it could be out of time and cause like problems. It could even cause you not to go into battery. Sounds like you found the problem. I would also look for some build up in the comp ports. Old John Link to comment Share on other sites More sharing options...
ipscbob Posted December 6, 2006 Share Posted December 6, 2006 As a matter of fact the comp is loose, though it doesn't move a lot. It will eventually move maybe 1/8 or less of a turn. I don't see signs of bullets hitting the comp, but it could be I don't know what I'm looking for. This is the first open gun I've owned. Never the less, I've taken comp off the barrel and I'll re set it this week. Luckily there was just a thread on this subject Doesn't take much depending on how concentric the comp/barrel, etc. is. Look for streaks of jacket material at each baffle. Let us know if this fixes it. Link to comment Share on other sites More sharing options...
Flexmoney Posted December 6, 2006 Share Posted December 6, 2006 As long as you are going to have the comp off...go shoot it. Shooting it without the comp off would be the perfect means of troubleshooting. Link to comment Share on other sites More sharing options...
Larry White Posted December 6, 2006 Share Posted December 6, 2006 As long as you are going to have the comp off...go shoot it. Shooting it without the comp off would be the perfect means of troubleshooting. Cone comp, cant shoot the gun without it.-------Larry Link to comment Share on other sites More sharing options...
tightloop Posted December 6, 2006 Share Posted December 6, 2006 As long as you are going to have the comp off...go shoot it. Shooting it without the comp off would be the perfect means of troubleshooting. Cone comp, cant shoot the gun without it.-------Larry Don't be too hard on Flex, he did not finance his gun and probably did not know that... Link to comment Share on other sites More sharing options...
BSeevers Posted December 6, 2006 Share Posted December 6, 2006 As long as you are going to have the comp off...go shoot it. Shooting it without the comp off would be the perfect means of troubleshooting. Cone comp, cant shoot the gun without it.-------Larry Don't be too hard on Flex, he did not finance his gun and probably did not know that... Yea and his first reply was something about Tenifer and trigger safeties Link to comment Share on other sites More sharing options...
Larry White Posted December 6, 2006 Share Posted December 6, 2006 As long as you are going to have the comp off...go shoot it. Shooting it without the comp off would be the perfect means of troubleshooting. Cone comp, cant shoot the gun without it.-------Larry Don't be too hard on Flex, he did not finance his gun and probably did not know that... Yea and his first reply was something about Tenifer and trigger safeties Is that like 6 bucks each or tenifer 2. Not hard on Flex, just easy on Al.---------Larry I am glad to see that speedy has evaded Merlins cat, so far.-------Larry Link to comment Share on other sites More sharing options...
Flexmoney Posted December 6, 2006 Share Posted December 6, 2006 Man...I'd reply with a witty retort...but, I don't want to have to explain it three times. Link to comment Share on other sites More sharing options...
tightloop Posted December 6, 2006 Share Posted December 6, 2006 Between the three of us, we'll sort it out...if it is really that witty... Link to comment Share on other sites More sharing options...
Al Capizzo Posted December 6, 2006 Author Share Posted December 6, 2006 And where is Merlin, I thought he replied to EVERYTHING Link to comment Share on other sites More sharing options...
Harmon Posted December 6, 2006 Share Posted December 6, 2006 (inside joke) your slide stop pin is bad, you need to shoot sierra bullets with blue dot powder..that will fix it. i bet the bullets are infact hitting the comp..probably towards the end of the comp. Harmon Link to comment Share on other sites More sharing options...
Al Capizzo Posted December 6, 2006 Author Share Posted December 6, 2006 (edited) You know if you people weren't all so helpful, I would have had a new gun. Thanks alot. And Harmon, if I shot one handed instead of off a bench, maybe I could hit somethin'. Edited December 6, 2006 by Al Capizzo Link to comment Share on other sites More sharing options...
Lee Bell Posted December 7, 2006 Share Posted December 7, 2006 i bet the bullets are in fact hitting the comp..probably towards the end of the comp. I don't believe it's necessary for the bullets to hit it for it to have a significant effect on accuracy. All it has to do is be out of line enough to disrupt the gas flow at the muzzle. Lee Link to comment Share on other sites More sharing options...
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