Random Windage Hits

[doverpack12]

I have been doing some load development using ladders combined with Bergers length method. I am close on a load but at 300 I shoot groups of 3 and once in awhile one shot will hit perfect for elevation but 5-7" left. I also had a few rounds do this in ladder testing. What can cause this. I will try to post up a picture of what I'm talking about tomorrow.

 

[Sam Millard]

Have you shot those best loads at 100 yards to see how they group?

 

[doverpack12]

Not yet I was planning on that tomorrow if I get time

 

[Cahunter805]

Many factors can affect this. Are you shooting from a bipod/rear bag? Preloading bipod? How is the trigger? Any wind? Are you using a chrony?

 

[Broz]

That's pretty drastic, but as stated many possibilities. Providing everything is tight with the scope mounting and scope function, my first thought is the rifle is deflecting under recoil. But many more things need looked at as well.

Jeff

 

[doverpack12]

View attachment 19320

This is my last round of 3 shots. Two of the shots were within 2" elevation and the other was dead center for elevation but 5"+ right. The round before also had one right in the same area. The squares are 1"

 

[doverpack12]

Not sure if that picture will show up or not.

 

[Broz]

What caliber, rifle weight, bullet weight , and is it braked. From what position are you shooting and what surface, rest and form is being used?

Jeff

 

[doverpack12]

The rifle is a Savage Model 11 in .260 Remington shooting 130 grain Swift Scirocco II nothing changed on rifle from the factory. I installed a Vortex Viper HSLR 4-16 scope with Talley Lightweights. Shooting from a bench.

 

[Broz]

I cant see the pic, but what I was going for was recoil and form deflection which surely can occur off a hard bench top with a bipod, but not so likely with a lighter recoiling rifle. One going out of group to the tune of 7" at 300 yards is significant. Of course all the basics of checking mounting is in order, as well as checking the load at 100 to see if it holds true there. Then there is always the unmentionable possibility of the "F" word. Flinch. Some load checking at 100 would be my next move.

Jeff

 

[doverpack12]

I shot at 100 a few minutes ago. I'll try and post up both target pictures tonight or in the morning.

 

[rayporter]

if you dont have wind flags all you need to do is hang a ribbon on a stake at 50 yd intervals when shooting at 300yd

at 100 yd put them at 25 or 30 yd intervals.

you dont need to do anything more than quit shooting when one changes direction. otherwise you are just making a guess.

 

[doverpack12]

View attachment 19332

This is my 100 yard target from yesterday. I shot two different loads using different powders I had worked up for the 130 gr Swift Scirocco II's. Shot from a bench with sandbags. .260 Remington. There are 3 shots along the top in a horizontal line with H4350 written above them that go with the one down and left. The other 4 are Ramshot hunter one of which went right but I know I applied just a little bit of pressure to the stock with my left hand pushing right and I have no idea what happened but after the shot I was kicked way off target pointing right. I felt good until the recoil then before I saw the hit I knew something was funny about the shot.

 

[doverpack12]

View attachment 19333

 

[doverpack12]

Last try then I'll go read the Image Posting thread. 100 Yard Target

 

[doverpack12]

This is the 300 yard target form Tuesday. This was my third round of 3 shots. These all felt good after the shot. I have two in line vertically then the one out to the right. There is another one to the right circled with round 2 next to it which was a round of 4 shots because I forgot to shoot 4 in my first round for a fouler.

 

[doverpack12]

Big squares on the 300 yard target are 1" and the small squares on the 100 yard target are 1/4" with the darker thicker blue lines being 1"

 

[Broz]

Well if I am reading all this correctly it looks like it will shoot groups close to an inch at 100. That should equal a 3" group at 300. So it is most likely some outside error being induced such as wind or possibly shooting form or methods.

Just my best guess

Jeff

 

[mtnrunner260]

Is the flier shot always come from the same position of the shot string? As in the last shot. If so is the barrel heating up? If not its like Broz said.

 

[mtnwrunner]

Well, for what it's worth, I've never had luck with sciroccos. I just tried developing a load for a friend of mine in a 300 win mag and they were all over the place---sometimes 4 to 5 inches apart from each other at 100 yards. Went to the gamekings and they worked out great for his rifle.

Randy