I am trying some new steps to reduce my flyers. I do not know if this will work but I will try some new steps for me. I weighed some rounds left over from BSWN had 20 at +or- 1 grain, 5 at 3 grains over and 1 at 4 grains under. going to shoot them this weekend at 300 yards and see what groups I get. Powder and CBTO are all the same. I have 500 rounds of brass so I weighed them I got two groups of 173 or 172 grains of about 220 each and the rest fell in ether 174 of 171 grains. Next I trim and pointed my bullets then I am sorting by CBTO by 1/1000 at-2,-1, 0, +1, +2. about 98% are -1,0, or +1. I am going to use the heavy and light brass and the +2, -2 bullets as fouler. I know I need a better scale. I have GemPro 250 and Ohaus Lyman M5 balance beam scale. I hope cutting the spread in weight of brass and cutting the spread of my CBTO will cut down on my flyers. I an shooting 43.4 grains of Varget and Burger 200.20X at a CBTO of 2.30" I am just trying to get more uniform groups.
Trying to reduce flyers
- Thread starter willbas
- Start date
Annealing my brass and using a K&M mandrel helped me more than sorting my brass.
Tuning at distance is the best. Got a feel for the seating depth window and powder charge.
BSWN 2019 had some interesting winds and certain relays got hit hard. I lost most of my point to the wind.
Tuning at distance is the best. Got a feel for the seating depth window and powder charge.
BSWN 2019 had some interesting winds and certain relays got hit hard. I lost most of my point to the wind.
I did on Sunday.
After first doing a full BR case prep.
A chamber has a volume. This volume runs from the bolt face to where the bullet seals the bore. Any time a different weight is put in the volume, pressure changes. I did a simple 1 time test using 100 win new brass , 243 win caliber in my Rem 40x. Brass seperated by 1/10 gr. I took 5 heavest, and 5 lightest. Shot groups with each. Then took 3 heavy & 2 light shot group. Then took 3 light & 2 heavy shot group. You could see the difference. It pays to weigh brass for an accurate rifle IMO.
Make groups of 3/10 th grs. FL every loading.
If mixing neck sized one time a nd Fl the next loading , case volume is different, requiring different powder charges.
A chamber has a volume. This volume runs from the bolt face to where the bullet seals the bore. Any time a different weight is put in the volume, pressure changes. I did a simple 1 time test using 100 win new brass , 243 win caliber in my Rem 40x. Brass seperated by 1/10 gr. I took 5 heavest, and 5 lightest. Shot groups with each. Then took 3 heavy & 2 light shot group. Then took 3 light & 2 heavy shot group. You could see the difference. It pays to weigh brass for an accurate rifle IMO.
Make groups of 3/10 th grs. FL every loading.
If mixing neck sized one time a nd Fl the next loading , case volume is different, requiring different powder charges.
+1 on annealing. Magic!
Do you use n Arbor press or a normal press? With an arbor press you can feel the different seating force. If one feels different from the others, set it aside and use that one as a fouler.
Which die to you use first before the mandrel? I have a body, full sizer ( can remove the expander ) and a competition die. Which mandrel is it, I have that K&M neck turning mandrel, will that work? Reason I asked is because I never used a mandrel before except for neck turning.
Do you keep seating the Redding body die deeper and deeper until shoulder bumps back .002"? Seemed a bit tight in the body die. I use Imperial wax lube. I have always used full sizing dies and seldom use the neck sizer bumped .002".
I use a Forster coaxial press with a Forster micrometer seater die
CharlieNC
Gold $$ Contributor
When trying to diagnose flyers in any situation (such as manufacturing) oftentimes the flyers themself present the strongest clues, as compared to trying to address the entire world. For example you can isolate that brass to measure and compare to non-flyer brass to get a clue or two. No clue? Shoot them again to see if the brass repeats as a flyer, meaning you're missing something. This approach does not always provide an answer, but it requires little effort and is efficient. Similarly instead of implementing wide scale practices such as sorting brass and bullets, isolate the outliers to shoot vs normals to determine if poi is affected.
Much like CharlieNC said, when I have an obvious flyer I will put the brass aside to look at later. Sometimes it is obvious that I missed something about that piece of brass that should have caused me to exclude it, but sometimes I am simply reminded that the flyer may have been due to the nut behind the trigger.
This is what is happening to me. Two were jerks that I call. The top 9 and one on the line (far right) I have no idea were they came from. (distance 300 yards) So with the good advice given here, I have made changes to my reloading and I have added an expanding mandrel. I do need to put more rounds down range and work on my trigger pull and breathing.
...or was it the wind, bench set-up, scope, load, etc, etc? Look at the PGA, most the same top players each week.
Ben
Someone has to say it, "Are you using wind flags?"..
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