fliers

[garvel]

I'm having trouble with fliers. I'M shooting a 6br 1 in 8 twist .237 bore krieger. Loaded with 30.0 grs. varget,105 vld berger 10 thousands into lands, cci450 primer. Will shoot three great and send two 2 inches out at 300yds. would appreciate all help. THANKS PS HAVE TRIED DIFFERANT POWDERS,NO IMPROVMENT.

 

[sunbuilder]

Try a different bullet.

Each barrel has it's likes and dislikes.

Assuming it's not a barrel, bedding, action, scope, mount, or reloading, shooting technique, rest issue.

 

[Bob3700]

First question I would ask, is this a new gun or a veteran who's performance has soured?

If a new gun, it sounds like a bedding or scope issue. Install/borrow a known good scope and shoot again. I've had issues with two Leupolds in the past. They'll fix em but never tell you what was really wrong!

Bedding, do you have the action screws torqued evenly? What sort of stock,wood or composite) and what torques did you use?

New gun? How about the bolt handle being in contact with the stock?

Bbl freefloated? Can you pass at least a .060" thick shim completely between your stock and bbl?

Those are off the top of my head. The symptoms don't sound like a loading issue. How about bag technique?

Bob

 

[garvel]

THANKS FOR THE HELP! IT IS A NEW BUILD,Checked bolt handle and it does appear to touch stock when completly closed. Thanks again, will fix problem,and try again.

 

[Bob3700]

Garvel,

I am just a simple guy and always like to check the easy physical aspects first.

Loading issues are another kettle of fish.

Check your loading practices against what DMoran suggested and see what happens once that bolt handle issue is taken care of.

Bob

 

[garvel]

I've taken care of the bolt handle problem sorry to say no improvement,but i sure do appreciate all the help.All help is truely appreciated,THANKS

 

[Bob3700]

Donovan,

You mentioned that you seat the Berger bullets so that you have a .006" long mark on the ogive and that is where they shoot best.

Just as an informational piece, I have measured Berger bullets several different ways, and the nose/ogive of the bullets vary by .010" over a lot of 500.

That variation is, IMHO, why shooters jam the lands to get them to shoot.

You are dead on with the light neck tension be directly related to low ES and SD as well as small groups.

Bob

 

[chris308]

Donovan,
how light of tension do you go? I've been playing around .003 tension., .258 bushing with a .261 loaded neck o.d.) This is with berger 105vld's. I too have been getting flyers. this is with all the classic powder/charge combos running about mid 2800's.
Also with a .006 mark on the bullet, were does this come out to as far as seating septh? I've been playing with .015 in. chris

 

[sewwhat89]

Mark the brass and see if the same pieces are giving you the fliers. It may be an internal/invisible intangible.

 

[Bob3700]

Chris,

If you have.003" of tension, that to me is NOT light.

When prepping necks, I will shoot for .0005" to no more than .001" difference between the ID of the case and the bullet.

When seating a bullet, once the press handle goes over center, it will fall of it's own weight. The bullet is tight enough that I cannot turn it with my fingers, but that is about all.

My loaded neck diameter is .271" and I size with a .270 to .271 bushing. I do not turn my necks at all.

When seating the bullet, I shoot for .020" into the lands with a Sierra bullet. I have not shot Berger bullets very much. Havn't seen the advantage of many $ more per box.

Bob

 

[Bob3700]

Donovan,

Glad to hear that you have such an excellent lot of bullets. Sure makes life a lot easier when you do.

On item that I have gotten into the habit of making when I chamber up a bbl is a short piece of bbl stub that I run the reamer into so that I have a throat and shoulder.

That is a nice tool to initially get your bullet seating depth from and then measure throat growth.

Question for you. I just received my 6MM BRX reamer and it has a .272" neck. That is supposed to be a no-turn neck with Lapua BR Brass. Have you found that to be the case or not?

Previous to this reamer, my necks on a couple of other 6mm cartridges are a little larger,like .274). I am shooting these cartridges in NRA Highpower prone competition,600 & 1K yds).

RGDS

Bob

 

[chris308]

Thanks guys, i guess i have way more tension than needed. I'll try a .260 bushing and go from there. I'm guessing I can up the velocity a bit too,??) chris

 

[Bob3700]

Donovan,

Thanks for sharing your information.

One last question for you. Do you recrown your bbls after a certain number of rounds? I know the point blank benchresters do. It would seem to be a reasonable task once you have say 1000 rds down a tube.

Your thoughts?

Bob

 

[Klong]

garvel, all the answers are possibles. I had a 6.5X284 start doing this after about 100 round where it had been shooting very nice groups prior. It would shoot 3 or 4 out of 5 very nice with 1 or 2 fliers. I had switched from a 5.5x22 Nightforce to a 8x32 Nightforce when it started. All shooting from both scopes was done at 22 power or above and 300 yards or beyond. I thought I had a bad scope or done something wrong in the mounting of the second scope. Turned out the answer was the parallax adjustment was a little off. Adjusted it and the groups came back to normal. Remember I said it would shoot 1 or 2 out of the group. These fliers could occur any time in the group,any 1 of the five, not just the last 2 shots) Something else to check. Good luck, and please let us know what you find.