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COLD BORE SHOT

Hello All
Issue cold bore shot is 3" high and 1.5 " left at 200yds. pretty consistent. Bore is borescope clean then 3 round for foul then allowed to cool then shot. First shot high left as described then the next three are a clover in center. It is a stock barrel on a Winchester Coyote 7mm WSM 168 gr. bergers at 61.0 gr Retumbo powder 2950 fps. The rifle has been bedded with no measurable stress. Everything is tight. Anyone have any suggestions?????????? :-\

Thanks
f21sh
 
What's it look like if you fire that first round as a cold barrel fouling shot, then fire 3 strings of three shots at different targets with the barrel warmed up?
 
Same result high left then dead on center after the first round. I just have not had a rifle shoot that different on a cold bore shot. Tried fouling then no clean wait until following weekend then shoot it again the same result. shot off of bags then all in one rest. Shoots the same. I borescoped after fouling it appears to be of a normal fouling pattern. Carbon just after the chamber not much copper fouling. I do not have a large amount of experience lookin down different bores.
 
not saying that this is exactly your problem just giving you something to ponder. when this happened to me it was hair pulling to figure out what was causing it. many will not admit to this problem but after thousands of rounds i finally realized it was me. I was simply flinching the first cold bore shot....everytime. and yanking the trigger.
 
That's not uncommon. What is a bit uncommon is the cold shot after the barrel is fouled.

Real curious if it's correctable. Over the decades, when similar has happened to me, I have gotten rid of hunting guns or barrels on hunting guns that did it.

Make it a target gun. Doesn't matter then.
 
Over many hundreds of cold bore shots in a .308, my rifles are consistent at 1/2 minute right and 3/4 minute low at 600 yards. Second shot halves that and third shot is dead on until about the 12th shot in a string when the impact starts to rise about a 1/2 minute (hot barrel). I shoot 22 rounds in about 8 minutes in competition unless the conditions are wild.

I suggest you let someone else shoot your rifle so that you can eliminate operator error. Go from there.
 
muley said:
Same result high left then dead on center after the first round. I just have not had a rifle shoot that different on a cold bore shot. Tried fouling then no clean wait until following weekend then shoot it again the same result. shot off of bags then all in one rest. Shoots the same. I borescoped after fouling it appears to be of a normal fouling pattern. Carbon just after the chamber not much copper fouling. I do not have a large amount of experience lookin down different bores.

First, let's acknowledge that the 7mm WSM isn't the most comfortable rifle to shoot without a good supply of mom's biscuit dough between the rifle butt and your shoulder.

If that's the case (three consecutive targets at the same range, each with three shot groups printing one high left and two tightly grouped and a consistent barrel temperature) the issue isn't the rifle, it's the shooter.
Things to check:
Make sure the rifle is not canted to either side.
Practice good breath control and trigger discipline (finger position, straight back squeeze)
Don't let your thumb extend over the top of the pistol grip. Let the thumb extend along side of the pistol grip and keep it relaxed. Use only the fingers of your hand to apply a slight compressive pressure against your shoulder.
If using a rest, use your left hand only to stabilize the rifle. Don't let the left hand put lateral pressure against the side of the stock or otherwise interfere with recoil.
Maintain adequate cheek weld on the comb but don't allow the cheek weld to put pressure on the comb.
Check to make sure nothing on the forearm of the rifle (e.g. sling mounting studs) contact the bags or other support devices during set up or recoil.
Whatever you do, even if it's not text book perfect, do it the same every time you line up and fire. Doing it the same way every time may not put you in the X ring but it will establish a group from which you can make further adjustments if necessary.
Best of luck ........... ;)
 
I'm thinking this is a hunting rifle with a light weight barrel. If that is the case, I'd chalk it up to heat induced expansion and I wouldn't worry about it.
 
It really doesn't matter as to the barrel weight in 4 shots, more than likely it is a bedding issue. If it has a pressure point on the barrel, remove it, free float it & shoot again.
 
Hello Gents
The barrel is completely free floated again no measurable stress using DTI. The action screws are tighten to 35 inch lbs. each. Scope is bedded both at the bases and rings mounted bubble level on scope base no cant. Everything torqued to specs. I have shot the rifle off of bags and in a Inventive Tech bench rest very stable however not sure effect of recoil profile. After all your sage advice I believe it maybe time to rebarrel the rifle. The barrel is approx. a #5 contour 1 in 8 screw shooting 168 gr. Berger VLD not a lite barrel but not heavy either looking at the crown under magnification nothing appears out of order. I seem to shoot the other two 7mm WSM just fine on the first round. :-\
 
IMO if you are not having trouble with pulling the first shots on other like calibered guns then it is probably time for a rebarrel. sad but some rifles just do that. like someone previously mentioned those are the ones that either get rebarreled or get sent on down the road
 
I've had the same problem on several rifles. Maybe the rifle is "settling" into the bags or maybe its my cleaning technique, I've just learned to compensate for it and it all works out.
 
Hi All
I will let someone else shoot it to rule it out. I have thought about just sighting for the cold bore POI or splitting the difference and living with that. However it just bugs me knowing that, not one for just letting it go. My buddy has a 7mm RUM he just dry patches because it shoots better fouled. I'm looking for a Rem LA Synthetic Stock as finishing a rebarrel for 7mm WSM build on a long action more room in the box. Barrel is a #5 contour 1in8 screw Shilen maybe I can finish it in two weeks MAYBE!! ???
 
Just curious - why are you shooting at 200 yards? Any shooter error will be magnified at this distance. Just for fun - try it at 100 yards and make sure the barrel is totally cool before shooting the second shot.

Are you using free recoil off the sand bags? Try holding the forearm with the stock resting on the front bag.

As suggested by the other posters, having someone else shoot it who is an experience shooter is good idea.
 

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