Posted: 3/6/2017 2:03:43 PM EDT
I am looking for ways to improve accuracy with my 9,3x62 rifle, and had a look at the crown. There isnt actually much of a recesion, perhaps i should recrown the barrel with the "brass screw and hand drill"-method?
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Is the crown square? Are there marks on the rifling or any damage? If no then don't mess with it. If there are, let a smith with a lathe take care of it.
What does the rest of the rifle look like? If the gun is not properly bedded or the barrel is not floated/ inconsistent pressure then those items will effect the accuracy more. What about sights? Scope bases, rings, the scope? What ammo are you using? Have you tried reloading for it or using match ammo? |
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The crown looks non-dented, but its a rather straight 90degree cut i think. The rifle is an old beater, and the stock looks terrible, the barrel isnt free floated(warped stock), lots of marks and it has a couple of small repairs. I have just finished sanding it down, and started to oil it with line seed oil and thinner. The only ammunition i hava tried is Norma FJM "Jaktmatch" 9,3x62mm, witch is considered to be quality ammunition(i think).
https://s18.postimg.org/yw2wdjwa1/collage_2017_03_07_2.png I havent tried the rifle with a scope, just used the iron sights. But im looking for a cheap scope to use on it. |
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A screw is not for crowning, it's for deburring.
That one looks like it's slightly rounded in the photo. If it's square to the bore centerline and shoots, then it's okay, a crown does not need to be recessed, although it's a good idea for a gun that might get banged around. I can't see a problem with the existing crown from the photo, but a close up look is needed. The question is, "how well does the gun shoot now?" The gun might be shooting to its potential right now. Bedding might help, or maybe not if the gun is not accurate at all. What is the condition of the bore? If the throat is eroded way out, that might be the source of accuracy issues. Have you considered having the rifle bedded? |
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Quoted:
A screw is not for crowning, it's for deburring. That one looks like it's slightly rounded in the photo. If it's square to the bore centerline and shoots, then it's okay, a crown does not need to be recessed, although it's a good idea for a gun that might get banged around. I can't see a problem with the existing crown from the photo, but a close up look is needed. The question is, "how well does the gun shoot now?" The gun might be shooting to its potential right now. Bedding might help, or maybe not if the gun is not accurate at all. What is the condition of the bore? If the throat is eroded way out, that might be the source of accuracy issues. Have you considered having the rifle bedded? I took the rifle out to the range(although the finish of the gunstock isnt really done), and i managed to get 3 shots from 100meters(109yards) with a CC of 35mm(1 1/2 inch) After that i tried a couple of shots from 300 meters, but of my first series of 3 shots only one hit the target. After that my shoulder started hurting from all the shooting, so i quit for the day. The one that hit the target was a bit high, so i probably didnt calculate my mildots correctly. Now the rifle is disassembeled and the stock is beeing covered with Tru Oil, for a nice finish. |
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After the first coat of Tru Oil cures, hold the stock in a glancing light to look for hazy regions. Rub those out until the underlying grain is easily seen and the haze is gone before adding another coat.
Consider cutting the Tru Oil with turpentine before adding the next coat. At least 50%. I've stopped fooling with Tru Oil on guns that I plan to use often for hunting or target shooting where they get banged up. After staining, I use a coat of Minwax Polyurethane or Gun Sav'r sprayed on, then rubbed in. Let the coat cure, then add the next one, rubbed in. The stock is finished by the end of the day after three applications. Your friends will think it's an oil finish. |
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I finished with the stock, it became alright. I had a hard time getting the Tru Oil down into the small depressions in the wood, but the stock is glossy and water repellent atleast. I took it to the range, and at 100 meters i got 3 shots within 35mm(100 yards, 1 1/2 inch) using Sellier&Bellot FMJ. I put a nice scope on it, a 6x40 that is surprisingly clear. Should i be happy with the group, or is there anything i should work with? The barrel is now free floated, the stock had warped a bit so it needed quiet a bit of sanding.
https://s16.postimg.org/8xp4q3wlx/collage_2017_03_18_1.png |
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I would say the rifle is shooting to its potential with that ammunition. It might be (probably is) more accurate with better bullets.
That rifle was built when 3 to 6 inch groups at 100 yards were accepted as adequate for a hunting rifle. Still is in some circles that never shoot anything that far. |