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Joined: Aug 2010
Posts: 894
Campfire Regular
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OP
Campfire Regular
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Posts: 894 |
I've shot 4 five shot groups at 100 and I'm getting about twice as much horizontal as vertical stringing. Before these groups, the scope shifted in the rings so I remounted the scope tightening the rings. Not farmer tight but definitely more than just using the screw driver with my fingers. A little bit of forearm strength this time. Scope has the parallax adjusted to 100 yards. Barrel has been floated and the action bedded. Any help is appreciated.
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Joined: Jan 2010
Posts: 674
Campfire Regular
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Campfire Regular
Joined: Jan 2010
Posts: 674 |
Handloads or factory ammo? What are you shooting?
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Joined: Aug 2010
Posts: 894
Campfire Regular
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OP
Campfire Regular
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Handloads. 308 win with 155 Scenars, 45.5 Varget, 0.030" off
I did shoot two other rifles on the same day, and I didn't have the same problem. So, I don't think it's technique.
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Joined: Jul 2001
Posts: 59,910
Campfire Kahuna
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Campfire Kahuna
Joined: Jul 2001
Posts: 59,910 |
Based on some experience, I would suspect the scope or the mounts/mounting.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
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Joined: Aug 2010
Posts: 47,727
Campfire 'Bwana
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Campfire 'Bwana
Joined: Aug 2010
Posts: 47,727 |
Proven scope? What kind of mounts and rings? Bases good and tight and loctited down?
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Joined: Aug 2010
Posts: 894
Campfire Regular
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OP
Campfire Regular
Joined: Aug 2010
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It's a new Bushnell LRHS so I'm doubtful it's the scope. Maybe it's the mounts. I'm using Talley LW mounts. Bases are tight for sure. Rings are a little tighter than I usually go. Maybe they are too tight??? I'll mount a proven scope with different mounts. If the scope is canted in relation to the bore, would this cause horizontal stringing??
The groups are 5 shots and go about 1.5" horizontal and 1/2"-3/4" vertical.
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Joined: Apr 2004
Posts: 3,450
Campfire Tracker
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Campfire Tracker
Joined: Apr 2004
Posts: 3,450 |
That is a very accurate bullet in a rifle that shoots well. Does this gun do the same with a different bullet? I`d start there. Also, unless the gun is proven to shoot well, because it`s bedded and floated, dose not guarantee accuracy. I`ve seen some wicked "bedding" jobs. I would also ask how the bullets fall...1st shot 2nd shot etc. My experience suggests that a three shot group of two together and one out, will go two together, but at different POI, with four shots. I would suggest bedding the problem.
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Joined: Mar 2005
Posts: 4,997
Campfire Tracker
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Campfire Tracker
Joined: Mar 2005
Posts: 4,997 |
I've shot 4 five shot groups at 100 and I'm getting about twice as much horizontal as vertical stringing. Before these groups, the scope shifted in the rings so I remounted the scope tightening the rings. Not farmer tight but definitely more than just using the screw driver with my fingers. A little bit of forearm strength this time. Scope has the parallax adjusted to 100 yards. Barrel has been floated and the action bedded. Any help is appreciated. Parallax adjusted by visual inspection or by the # read off the knob?
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Joined: Mar 2003
Posts: 8,422
Campfire Kahuna Emeritus & Campfire Outfitter
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Campfire Kahuna Emeritus & Campfire Outfitter
Joined: Mar 2003
Posts: 8,422 |
What action and model designation?
"God Loves Each Of Us As If There Were Only One Of Us" Saint Augustine of Hippo - AD 397
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Joined: Dec 2011
Posts: 580
Campfire Regular
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Campfire Regular
Joined: Dec 2011
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I had a load for my 270 using a stiff charge of RE22 under a 130gr TTSX. I got just over 3,200fps and was stoked to use it, but had horizontal stringing.
I tried different brands of brass, primers and seating depth, R & R'd the scope and bases, even rebedding the rifle, all to no effect.
What cured it in my rifle was H4831SC and IMR 4350, though I did lose about 50fps.
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Joined: Aug 2013
Posts: 1,796
Campfire Regular
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Campfire Regular
Joined: Aug 2013
Posts: 1,796 |
Did you lap the scope rings? Sounds like you may have bent the scope tube when you tightened it down the second time.
Before the scope shifted and you tightened it down, was the rifle grouping ok?
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