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Vertical stringing pattern on target |
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samchap
.416 Rigby Honor, Integrity Joined: 12 August 2003 Location: United States Status: Offline Points: 1781 |
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Posted: 05 October 2016 at 04:12 |
My brother has spent several years locating and
refurbishing bolt action 30-30s for his grandsons. Last Christmas each one got one of them for Christmas. Monday he took one, a 9 YO, to the range so he could shoot his. Brother first put two 100 yard shots in the center to make sure all was ok. His grandson's first time shooting it and printed nine shots with a ~1" wide pattern about 5" high on center and about evenly split vertically. All in all not bad for a shaver's first time at bat in the big leagues. I seem to remember that you can tell what is going on between shooter and the rifle by the shot pattern on target. I'd appreciate it if someone would explain that again. |
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samchap - Waldoboro, ME
Be careful what you decide to not like. Your wife may wear one. Your son may ride one. Your daughter may bring one home. You may have to have one someday. |
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BEAR
Administrator Joined: 07 September 2013 Location: Appalachian Mtn Status: Offline Points: 13734 |
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vertical stringing is usually from letting the rifle
'bounce' up when fired. All rifles seem to have the axis of the bore above the butt stock...so then they MUST, under the laws of physics, recoil muzzle up. BUT, if you keep the shoulder tightly against the butt-stock; most of the recoil will be back and the muzzle rise will be minimal. Using bench rifle rests like LEAD SLED will make the vertical stringing much higher/longer. If the recoil energy isn't used to push the shooter back; then the muzzle rise will take more energy and rse much higher thereby making vertical stringing. When shooting off a bench, I suggest putting one finger of the non-trigger hand across the barrel just in front of the scope, pressing downward then firing. keeps the barrel down on the bag, minimal barrel rise. Especially for young shooters, using regular sand bags will get tighter groups. We might think that absorbing recoil in a lead slead, will help them. but it doesn't work that way. 30-30 with light loads is one of the best cartridges for starting young shooters Assume he is using 340 Savage rifles or a brand marked variation. I have used on for 35 years to teach dozens of shooters. |
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CB900F
Administrator Honor, Integrity Joined: 10 June 2003 Location: Eritrea Status: Offline Points: 8857 |
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Samchap;
There's at least one more point to consider along with recoil muzzle rise. That's pressure point, particularly in guns that do not have free-floated barrels. Simply put, the forearm of the gun should be at the same point on the front rest for every shot. You'll frequently see a little tip locator bar at the downrange end of good front rests for just that reason. However, if the barrel of the gun you've posted about is free-floated, then finger pressure on the top of the barrel will alter the vibration cycle of the barrel. In other words, it may shoot better off the bench, but it won't shoot the same way in the field. Get the boy comfortable on the rest with the gun unloaded. Then put a piece of masking tape on the bottom of the forestock just where it contacts the front rest. Every subsequent shot should have that tape in the same relationship to the rest. Now have him hold the forestock just as he would in the field. No down pressure, just the weight of the arm & hand. If necessary, put another piece of tape there. He can clamp with his hand, but don't pull down. The weight of the arm will control recoil if he's holding it tight enough to not let the recoil pull the gun out of his hand & let it rise uncontrolled. Then with the buttstock pulled firmly into the shoulder, he should be consistent with his shots. Another trick is to make sure the trigger finger is in a large C shape. The finger should not touch the stock. This will help with pulling the trigger directly to the rear & eliminate side pressure from the finger's contraction in tripping the trigger. And, finally, is the gun scoped or not? 900F |
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Birth certificate!? He don't need no steenkink birth certificate!!
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samchap
.416 Rigby Honor, Integrity Joined: 12 August 2003 Location: United States Status: Offline Points: 1781 |
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Thanks. All good usable advise.
The rifle has a single power 4x scope. I don't recall the make. I do remember that when I first fired my 30-06 it was off two living room couch pillows and I got the best groups I've ever had with that rest. I'm going to revisit that set-up for me. |
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samchap - Waldoboro, ME
Be careful what you decide to not like. Your wife may wear one. Your son may ride one. Your daughter may bring one home. You may have to have one someday. |
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BEAR
Administrator Joined: 07 September 2013 Location: Appalachian Mtn Status: Offline Points: 13734 |
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is it a 340 savage or a branded one?
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samchap
.416 Rigby Honor, Integrity Joined: 12 August 2003 Location: United States Status: Offline Points: 1781 |
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Bear, I'll get back to you on that.
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samchap - Waldoboro, ME
Be careful what you decide to not like. Your wife may wear one. Your son may ride one. Your daughter may bring one home. You may have to have one someday. |
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Wing master
Administrator AKA StraightShooter Joined: 10 June 2003 Location: United States Status: Offline Points: 7481 |
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I have also read that if you are using handloads you can
go up with your powder charge to help verticle stringing. I would try the other ideas first. Wing master |
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I have always considered myself to be quite the bullshitter, But ocasionally it is nice to sit back and listen to a true professional......So, Carry on.
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