The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Rifles Medium Bore Rifles How much heat related verticle stringing is too much?Go | New | Find | Notify | Tools | Reply | |
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My weatherby Mark V synthetic in 30-06, 24 inch barrel and Kahles 2.5 x 10 went to the range today with a three boxes of WW 165 grain store bought power point shells that I was going "shoot out" to reload with Nosler bullets. Just shooting off the sandbags at 100 and shooting 8 rounds in about 4 minutes I noticed that the gun put the first two 0.5 inches high ( my zero) the next two 1.25 inchs higher and the last 4 into a 1/2 group at 2.5 inches above my zero. I tried this twice after letting the barrel cool and then I loosened the forearm screw a bit, let the barrel cool again and it did the same thing! The barrel is a bit hot at the end of the string. The stock is synthetic and I was resting the gun on the bag just forward of the floor plate. I even tried putting my hand on top of the scope to add weight but this did not do anything. Why does this gun string like this when it is hot? Can you fix this with handloads? Is it possible there is a problem with the stock, or should I just not worry about it? I let the gun cool and put a 2 inch by 2 inch rock on top of the target and vaporized it off the side of a tree at 80 yards, so I am still confident in the gun...but what can I do to reduce this phenomina?? | ||
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Hello Jimmy, Ideally you want a barrel to shot "triangles". This is an indicator that the barrel is oscillating freely and theoretically would shot a circle if you continued shooting with the same hold. As your barrel heats up it is coming in contact with a high spot in the barrel channel of the stock and putting upward pressure on the barrel. Next time try sliding a dollar bill between the barrel and stock channel after the barrel is hot to try and locate where the barrel is touching. You can then smooth this area out. | |||
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I agree with Buliwyf, free float the barrel and see what happens. The gun seems to be shooting quite well other than this. /////////////////////////////////////////////////////////////////////////// "Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery." Winston Churchill | |||
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OK, I continue to learn about rifles even at my tender and advanced age. This is the second time I have had this advice, the first on a 270 and the preasure point was on one side which I fixed. I will now hunt for this problem... | |||
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Is this a hunting rifle? Who cares what the group does, unless you need to shoot three or four times to kill an animal. Try instead to see what the rifle does with a first shot/cold barrel: shoot once, put the gun down for a while shoot others etc, go back and shoot again........do a group over a long time. If you're happy with the cold barrel group, who cares what it does off the bench. There are two types of people in the world: those that get things done and those who make excuses. There are no others. | |||
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"...because only accurate rifle are interesting...". Townsend Whelen circa 1930's. Rich NRA Life Member DRSS | |||
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yes it is a hunting rifle but I think it should shoot 5 shots into at least a 2 inch circle at 100 yards even as the barrel heats up some.. | |||
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Hey Jimmy, Excellent shooting - DO NOT mess with the rifle if you are going to Hunt with it. If you plan to sit at a Bench and shoot the majority of the time, then you have the wrong Barrel and need to have it replaced with a Bull Barrel which has been Cryogenically Treated. Then you can sit at the Bench and blast away to your hearts content. However, for your "Hunting Rifle", it is far more improtant knowing that those first two shots from a pristine clean and lightly lubed Barrel will do just what yours did. Then reclean, lightly lube, run a couple of dry patches through it. Then shoot another group. I actually prefer Cumulative 1-Shot Groups with cleaning, relubing and drying between each shot. In over 5-decades of killing things, I can count on one hand the number of times I've had to shoot twice at the same animal and never three times. With a rifle as accurate as you have, you should be able to do just as well as I have - possibly better. I do agree that only Accurate Rifles are interesting - and yours is well within that definition for Hunting. Good hunting and clean 1-shot kills. | |||
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It's just not at the bench that the problem might occur. If you work up a load and sight in during the summer in Georgia when it is 95 degrees and then go hunting when it is 20 degrees outside, you may have a change in point of impact. That's why I prefer free floaters. ____________________________________ There are those who would misteach us that to stick in a rut is consistency - and a virtue, and that to climb out of the rut is inconsistency - and a vice. - Mark Twain | Chinese Proverb: When someone shares something of value with you and you benefit from it, you have a moral obligation to share it with others. ___________________________________ | |||
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And these funny barrels would change POI no matter what the heat source? I put a barrel down in the sun for 20 minutes and it was miles too hot to hold onto the barrel. Probably worse than I'd ever shoot it. | |||
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It is fine for shooting a white tail and the confidence in the rifle is right there as you just know that first round in our "under 100 yard, which is 90% of the time" shooting situations in Georgia that bullet is going right into that little spot you aim the rifle into. I am just going to have to work with it a little as I want to be able to shoot it five times at up to 300 yards and be able to hit with it without much problem. | |||
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The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Rifles Medium Bore Rifles How much heat related verticle stringing is too much?
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