walt1980 Posted October 21, 2015 Report Share Posted October 21, 2015 A mates just shown 6 pattern plates he did today, he's been shooting a long time so not new to it all, on all 3 plates which had the top barrel fired, all high and left! Shot spread was fine, 3/4 choke, but all left and high of centre, bottom barrel, 1/2 choke, all really good and centre. Gun is a browning 525, standard chokes, cartridges were a mix, but each was a pair. 2 X 28/7.5 4 X 30/6 He's going to swap the chokes over and see if it was them, any ideas anyone?? Plates were at about 15 yards and I would say centre of the shot group was approx 4" left and 4" high. In the plates it's in section 1 just inside the first circle. Will try and get pics tomorrow. Quote Link to comment Share on other sites More sharing options...
subsonicnat Posted October 21, 2015 Report Share Posted October 21, 2015 Chokes are not true, off centre.Not round.?. As said swop them, it will tell you if its the chokes,or even the barrels not soldered parallel. Quote Link to comment Share on other sites More sharing options...
DaveyTed Posted October 21, 2015 Report Share Posted October 21, 2015 Were the two barrels fired one immediately after each other? If so, could it be the effect of recoil lifting the gun slightly. Just a thought. Quote Link to comment Share on other sites More sharing options...
Gunman Posted October 21, 2015 Report Share Posted October 21, 2015 Personally I think 15 yards is a bit close . There will be some rise in the shot due to ballistics and 4" in a 30 inch circle is really not much . Most O/U's I have tested with barrel mounted lasers will have the top barrel line up fairly flat and bottom barrel line up around 9" high . Better men than me may explain the cartridges ballistics but I seem to think there is a 2&1/2 degree rise in the shot after leaving the muzzle which will peek and then drop dependent on range and velocity. Patterning is all well and good but it can have a detrimental effect in the mental concern set in the shooters mind . Best advice I heard was that you buy a gun and learn to shoot it . Quote Link to comment Share on other sites More sharing options...
Vince Green Posted October 21, 2015 Report Share Posted October 21, 2015 (edited) Its more common than you would think for shotguns not to shoot to exactly the same point with both barrels. It only becomes a problem if it becomes a significant difference and starts affecting the performance. Edited October 21, 2015 by Vince Green Quote Link to comment Share on other sites More sharing options...
kent Posted October 21, 2015 Report Share Posted October 21, 2015 It's quite a skill to regulate double rifles to shoot to the same place but if you notice it in a scatter pipe your too good a shot for it to create any real concern I recon Quote Link to comment Share on other sites More sharing options...
ChrisAsh Posted October 21, 2015 Report Share Posted October 21, 2015 I always understood that sporters should shoot 60% high and 40% low whilst field are 50% / 50% Quote Link to comment Share on other sites More sharing options...
walt1980 Posted October 21, 2015 Author Report Share Posted October 21, 2015 Shots fired aiming at the same point, could understand it if it happened once or even twice but 3 times? Hopefully the choke swap might answer it. It's a field model not a Sporter, 4" at 15 yards isn't much but most pheasant he shoots are 35+Yards, by my bad maths it works out about 10" off centre! A higher bird even more, reduces the chances of a clean kill I reckon. Quote Link to comment Share on other sites More sharing options...
BrowningB525 Posted October 21, 2015 Report Share Posted October 21, 2015 I always understood that sporters should shoot 60% high and 40% low whilst field are 50% / 50% My understanding was that game guns shoot 70/30 so that you can see your kill without lifting your head from the stock. Quote Link to comment Share on other sites More sharing options...
Exudate Posted October 21, 2015 Report Share Posted October 21, 2015 Chokes are not true, off centre.Not round.?. As said swop them, it will tell you if its the chokes,or even the barrels not soldered parallel. Although not a o/u, an off-centre choke was the cause of this problem on my Benelli M2. A warranty replacement barrel from GMK sorted it out. Quote Link to comment Share on other sites More sharing options...
Junkyard Dog Posted October 23, 2015 Report Share Posted October 23, 2015 Best way to tell if its barrel or choke, is to put the shells away and borrow or buy a laser bore sighter, that fits in end of barrel. Clamp the gun to an unmoveable object and place laser in bottom barrel aim it at a target at a set distance of 15+ yds distance, get a helpet to mark where the laser hits, change barrels and repeat (without un clamping the gun), if it is throwing the dot way off, change the choke and try again. I have come across guns that have been mis alligned when the tubes were soldered, to the tune off 12" + to one side, so it could be either. If its just height and no side deviation it probably wont even be noticed when shooting. Did he have problems, is that why he patterned it? Quote Link to comment Share on other sites More sharing options...
walt1980 Posted October 27, 2015 Author Report Share Posted October 27, 2015 Patterned it more out of interest than anything else. He was given a few cardboard plates. I've got pics now so will up load them later. He's now blaming this on missing some easy pheasants haha any excuse!!! Quote Link to comment Share on other sites More sharing options...
30-6 Posted October 27, 2015 Report Share Posted October 27, 2015 After many years of buying my first shotgun, a Lanber field model o/u multichoke, I decided to pattern it. The top barrel shot ok - slightly high, the bottom barrel shot low, but both vertically ok. I mentioned this to the dealer from where I had it years before, so way out of warranty, and he said probably barrel not soldered in correct position. When shooting it now, I only use cyl or 1/4 choke in the bottom with 7's or 7.5's and 1/2 choke with 6's in the top. I have got used to " thinking " over for bottom barrel and under for top barrel, and it seems to work for me, so basically blotting out the target with the bottom barrel. Quote Link to comment Share on other sites More sharing options...
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