LuPiN8oR 333 Posted June 17, 2013 Report Share Posted June 17, 2013 Hey guys, i have a 21in s308 with a vortex 2.5-10. Tried to zero the scope using tula 150gr fmj and win 150gr pp. Went through 20 rounds of each and my poi kept changing. regardless of scope adjustments... it was all over the place. I got it on at 25m but @ 100m it was insanity. Checked the scope rail and rings for tightness, everything was locked down good. I wouldnt even bother to call my results @100 a group. Im thinking 1: she dont like 150gr ammo, 2: i need more trigger time behind it (operator error) or 3: the mount is flexing thus changing my poi regardless of scope adjustment. The mount is a utg mount, never had an issue with it on the x39 (and shouldnt the mount flex back to proper position?).I got the 308 used, but it looked immaculate and i converted it w dinzags parts. Maybe she needs broken in? Sorry for the rant, just trying to give all the info i can in an attempt to narrow down all the factors. Let me know what yall think i should do. Quote Link to post Share on other sites
Rhodes1968 1,638 Posted June 17, 2013 Report Share Posted June 17, 2013 Is it a side mount? Can you try the scope on another high recoil rifle? Quote Link to post Share on other sites
LuPiN8oR 333 Posted June 17, 2013 Author Report Share Posted June 17, 2013 Id thought trying the side mount and scope on my x39, thats the next biggest caliber i have. Quote Link to post Share on other sites
Sdustin 578 Posted June 17, 2013 Report Share Posted June 17, 2013 Are you shooting groups like 5". Cause I can shoot great at 25 yards but when I move to 100 it opens up..... A lot. Of course all my shooting is with iron sights and my rifle was NIB and is 16" so that could change things. Quote Link to post Share on other sites
Sdustin 578 Posted June 17, 2013 Report Share Posted June 17, 2013 This is iron sights at 45 yards. Also it's 150 grain magtech. 145 grain shoots a little better. What kind of groups are we talking 8"+ Quote Link to post Share on other sites
LuPiN8oR 333 Posted June 17, 2013 Author Report Share Posted June 17, 2013 @100 i can shoot a three shot group and itll be all over the place horizontal and vertical. Literally all over Quote Link to post Share on other sites
Sdustin 578 Posted June 17, 2013 Report Share Posted June 17, 2013 What kind of groups are we talking 8"+ I mean is it just shooting that bad or maybe there's a problem. Quote Link to post Share on other sites
LuPiN8oR 333 Posted June 17, 2013 Author Report Share Posted June 17, 2013 8+ groups. On the last couple rounds i was getting alot of gas in my face. I just took the rifle apart to check for anything odd and noticed the gas tube extremely hard to remove. Finally got it popped out and the detent spring on the end of the gas tube was bent. I bent it back and reassembled. Next im going to mount the utg mount onto the x39 which has proven itself group wise and see whats up. Quote Link to post Share on other sites
Sdustin 578 Posted June 17, 2013 Report Share Posted June 17, 2013 It sounds like the rifle may have a problem. I don't know if it would make a difference but could the gas tube be slightly out of line and could that cause the bolt carrier to rub on the tube? Or could it be getting a different gas impulse each time? How is it with iron sights? I don't even know if these problems would cause it to shoot bad but it couldn't help. Quote Link to post Share on other sites
LuPiN8oR 333 Posted June 17, 2013 Author Report Share Posted June 17, 2013 Hadnt tested it with iron sights to be honest, i wanted to get the scope up and running then fall back to check them. I may have found part of the problem tho. The rings. Id checked them before and decided to check again just to be sure and the damn things must have shaken loose! I feel like an idiot lol. Was able to turn them tighter to the mount by 1 1/2 turns each. I honestly thought i had em so tight they wouldnt come loose, never did on the x39. I suppose there really is that much more recoil huh? God i feel like a tard. Rain notwithstanding ill shoot again asap. My apologies guys. Quote Link to post Share on other sites
Sdustin 578 Posted June 17, 2013 Report Share Posted June 17, 2013 Sounds like your all set. Good luck and post some good groups when you shoot them. The best at 100 I've done is about 5" but it's all iron sights so I'm not going to say the gun isms capable of better. Quote Link to post Share on other sites
TigerMoses 31 Posted June 18, 2013 Report Share Posted June 18, 2013 Muzzle device installed? Quote Link to post Share on other sites
LuPiN8oR 333 Posted June 18, 2013 Author Report Share Posted June 18, 2013 Nope not yet, hopefully it was just the rings that worked loose on me. Some blue loctite should fix that tho lol. Quote Link to post Share on other sites
Sdustin 578 Posted June 18, 2013 Report Share Posted June 18, 2013 Range report. Quote Link to post Share on other sites
LuPiN8oR 333 Posted June 18, 2013 Author Report Share Posted June 18, 2013 Rains pretty much set in for the rest of the day, soonest ill be able to run her and rezero (hopefully) will be tomorrow after work. Ill keep yall posted (crosses fingers). Quote Link to post Share on other sites
HB of CJ 1,263 Posted June 19, 2013 Report Share Posted June 19, 2013 Barrel loose? Try this simple test. Shoot at 100 yards with varying down pressure on the barrel. If you have a muzzle mounted bipod, this is easy to do. See if you get any real bad vertical stringing. If so, have you and a buddy then just grab the unloaded rifle and see if you can detect ANY wobble in the barrel in the trunnon when holding the stock firmly and wiggling the barrel hard. Low probability. HB of CJ (old coot) Quote Link to post Share on other sites
Sdustin 578 Posted June 19, 2013 Report Share Posted June 19, 2013 I would think a loose barrel would be a super rare happenstance. But nothing is impossible I guess. I think he has found the problem with loose scope mounting screws. Quote Link to post Share on other sites
LuPiN8oR 333 Posted June 19, 2013 Author Report Share Posted June 19, 2013 Range report delayed, just ordered another m.i. rail and rings. While i wait for it ill check the irons tho. Quote Link to post Share on other sites
Sdustin 578 Posted June 19, 2013 Report Share Posted June 19, 2013 I'd like to get a scope for my s308 but it's so much cooler with A folding stock and just irons. I do want to change to the tech sights rear sight. Then maybe weld a mounting plate for a mini red dot like the RMR at the old rear sight block. Quote Link to post Share on other sites
LuPiN8oR 333 Posted June 19, 2013 Author Report Share Posted June 19, 2013 (edited) If you decided to use tech sights rear, you should be able to use the m.i. red dot mount that replaces your leaf sight i think. Thatd be pretty slick imo. Not totally sure but might be worth askin about lol The way i kinda see it, my sgl w folding stock fills the niche of using irons or the 1-4 which can be ripped off fast if something happened. I saw the 308 more as my longer range weapon and really want that 2.5-10 to work out well. I decided to go ahead n pick up another m.i. mount bc i did feel kinda derpy trying to use a cheaper mount and cheaper rings which im almost sure is the reason i encountered such issue. But it did work on my x39... ah well lol. Hopefully after this im done buying shit except for ammo for awhile. Edited June 19, 2013 by LuPiN8oR Quote Link to post Share on other sites
Sdustin 578 Posted June 19, 2013 Report Share Posted June 19, 2013 Haha done buying shit???? That never is true. Quote Link to post Share on other sites
Deadeye 325 Posted June 19, 2013 Report Share Posted June 19, 2013 (edited) I didn't have any luck using the side rail on my 308. it seemed to have too much flex for a larger recoil of the 308. with every thing tight I could still flex the scope almost a 1/16 inch side to side by hand. So I went with the dph beryl rail it is solid as a rock and I keep my iron sights if ever needed Edited June 19, 2013 by deadeye Quote Link to post Share on other sites
LuPiN8oR 333 Posted June 20, 2013 Author Report Share Posted June 20, 2013 Haha done buying shit???? That never is true. C'mon man im tryin lol! And thanks deadeye if the m.i. rail doesnt pan out ill get that. And then ill have two rails up for grabs. Quote Link to post Share on other sites
zagumennyyilya 51 Posted June 20, 2013 Report Share Posted June 20, 2013 m.i. is midwest industries? those mounts are really nice, you should have no problems with them, when you compare the m.i. mount to a cheaper mount you should be able to see where the m.i. mount is so much more beefier in all the right places. Quote Link to post Share on other sites
LuPiN8oR 333 Posted June 20, 2013 Author Report Share Posted June 20, 2013 Yeah i have one on my x39 its super lol. Quote Link to post Share on other sites
LuPiN8oR 333 Posted June 30, 2013 Author Report Share Posted June 30, 2013 RANGE REPORT! Finally, i got saturday off and it wasnt raining! I got the m.i. mount and rings w scope set up and locktited down HARD a few days ago, have been waiting for a day like this. Slapped the scope mount on and began adjusting the scope. Temp was 80°, winds calm, distance was 100m. I used tula 150gr fmj and on the last groups i used win.150gr pp to try to fine tune. Apparently it was the flimsy mount w non locktited screws after all! I was firing a three shot group, then adjusting on #4 and again on #5. Last pic is to show what the 3 shot group looked like before an adjustment, was excited n accidentally measured using shot #4 but you get the idea lol. Im pretty satisfied with the results! Quote Link to post Share on other sites
LuPiN8oR 333 Posted June 30, 2013 Author Report Share Posted June 30, 2013 It should also be noted that i was only loading one round into the mag at a time after i got her close. Quote Link to post Share on other sites
S5snake 41 Posted June 30, 2013 Report Share Posted June 30, 2013 Which MI mount did you end up putting on your 308? Quote Link to post Share on other sites
LuPiN8oR 333 Posted June 30, 2013 Author Report Share Posted June 30, 2013 (edited) Standard side rail one, not the 30mm dedicated one. Eye relief would be an issue w that one i surmised. Edited June 30, 2013 by LuPiN8oR Quote Link to post Share on other sites
S5snake 41 Posted June 30, 2013 Report Share Posted June 30, 2013 Cool, I have the same mount but I need to get another set of rings as my scope sits a little to high for a good cheek weld. Thanks Quote Link to post Share on other sites
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