Bullet tuning Help

C

Caine

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eny coment on this, 4 difrent settings on my Harrel. Using 66grs ultra.
Having a hard time geting lodes im happy whit. This is shoot in a hart barrel 6ppc 262 neck. Using N-133, fed match primers.
Shoot from left.
 
Caine,

Can you tell us what powder weights you tested there ? Also what bullet seating ?

Bryce
 
Starting at 28,4grs at left and working up ca 0,17grs 0,0135inc back from full jam.
 
Sounds like you tested around 28.4, 28.6, 28.8 and 29.0 grains, more or less ?

With 66 Ultra's my rifle liked around 29 - 29.2 grains or up in the 30 grain plus range. With the lower (29 grain) load a seating depth of 10 thou longer than just touching the lands worked best while at the hotter load more engagement into the lands (20 - 25 thou) was what the rifle liked. I don't know what the relates to relative to your jam.

At a guess I'd say that maybe the third target shows some promise and would possibly respond to moving the seating depth in and out. It looks like it wants to have less vertical than the others. I found with the double radius bullets like the Ultra they would respond well to seating depth changes but needed adjustments of about 5 thou at a time to do very much. They seem to be less sensitive to small changes than a convention low number ogive.

Just a guess but I'd try that third charge and go in and out 0.005 and 0.010 and see what happens, say 0.12 and 0.25 millimetres.

I'd also seat the bullets jammed pretty hard and work powder up say 0.2 grains at a time up towards 30 or so grains and see what happens. With 66's I went up to 30.5 grains with no pressure signs at all, easy extraction etc etc .... but be careful, every rifle is different.
 
Caine
mumble mumble..... discart the first one from left to right, uot of tune,
then work with the rest of groups, changing seating depth in and forth no more than 0.05 at time from jam point.

here a skematic tune section.

oal +0.05 jam point try 53.0 54.0 55.0
oal jam point try 53.0 54.0 55.0 cliks on jones
oal -0.05 jam point try 53.0 54.0 55.0

i've attached my personal tune reminder for the SS ....


find the proper window ( at least a cuople of combination that works) u'll refine in half cliks.

ps: do this into condition , preferrably at 200 and in cross wind.

just my 0.02 Euro cent words

Gian
 

Attachments

  • Tuning Work Section XXXIII FISS.doc
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Bryce;
Thanks, som how i hawe a harder time geting my LV to shoot then my old hunter class remy. Ust canged to HH-6 and one more grs powder and moved the bullet 0,008inc from jam.
Il trye the third lode and move the bullet in and out.

GLF;
Thanks, do my best. Are you going to Umeå EC this summer?
 
Caine: Here is a synopsis ...

of an article written by Lee Euber entitled "Scanning" For The Right Load, on pages 197 to 198, of The Benchrest Shooting Primer, that I put together for myself and found extremely helpful. Perhaps it may be of assistance to you also.

Working Up a Load …. by Lee Euber

1. Polish bullet with steel wool. Initial seating depth achieved when bullet is marked by all lands. [Tony Boyer likes to see a square.]

POWDER

2. Load 3 cases in a low grain load. Increase each 3 case load by .5 of a grain, and then shoot. Increase loads until primers show pressure.

3. Identify shots that grouped well, not so good, and then good again.

4. Pick load that shot the best. Load 3 cases with .1 grain less, and 3 with .1 grain more, for another comparison.

5. After picking best charge for use, load 30 cases with the same powder charge.

SEATING DEPTH

6. Load the 30 cases in groups of 3, increasing the seating depth from touching the lands to jumping about .040 of an inch, in increments of .005 of an inch.

7. Shoot all 30 rounds without cleaning or clean after each 10.

8. Use ONE fouling shot after each cleaning.

9. Select load that shot best. Load 5 cases with that powder charge and seating depth.

10. Load 10 cases, 5 with seating depth .005 less than benchmark figure and 5 with .005 more.

11. Can compare more than once or change seating depth by .001 or .002.

12. Once you’ve picked the best seating depth, load 15 cases at that depth.

POWDER

13. Check first test by varying charge by .1 grain, for each 5 shot group.

14. Shoot in a medium wind condition, letting the gun do the work.

SEATING DEPTH

15. After picking the best load jumping the lands, compare it with the load that touches. Compare these loads again and again, on different days, in varying conditions, deciding which one is best.

16. If it doesn’t shoot to your satisfaction, restart with a different powder.

NECK TENSION

17. If you decide on the load that puts the bullet in the lands, be sure neck tension is tight enough to hold the bullet uniformly.

18. Its hard work if you want to go to matches and be in contention. Art
 
This method is good in that

a person has reference points to work with. Putting one's faith in one tenth increments with a powder mesure is a bit much to ask, in my opinion unless one is like some individuals who seem to be able to throw precise charges.

I think you will find that seating depth has more to do with accuracy that varying the powder does. From my experience, it is usually possible to find accuracy using seating depth along with A load that gives one enough OOMPH! The OOMPH is important.

The problem with testing to the degree Lee outlines is the time involved and the wear and tear on the barrel. One can wear the good out of a barrel testing, what then?

One thing I have found is that to get consistent seating depths one must measure the bearing length of their bullets. I have yet to see a lot of bullets that didn't have variations in them. Trying to do small, precice adjustments can't be done successfully without precice components. In my opinion, I might add.
 
Just observations;

-The load on the left is probably too light causing the vertical. It doesn't make any difference how well you shoot or can read flags, if you have vertical it can't get any better than the vertical amount.

-Groups 2 and 4 are round. Best place to work from, round groups.

-Group 3, looks like wind, but notice, almost no vertical at all! That observation being made, group 3 may be the best. Did you use flags or could you have missed a pickup?
 
Were no wind at all this day, but i shoot over snow whit a bit if fine powder snow coming down. Had 3 flags up.
Im going to the range angen on saturday. Update then.

Are using .262 nec. sice of nec whit bullet in are .2605 also have som brass that are .260 and som .2595 will trye them to.
 
Cain

With all due respect, I would not call any tuning session valid if you were shooting in a fine snow fall, or even a light rain. I have been forced many times to shoot in the rain during matches, and I am not buying that BS that rain, (or snow), does not affect the bullets path to the target.
Every group shows verticle, three of them a bullet holes worth.
What brand and style of bullet are you shooting??........jackie
 
Barts ultra 66grs
Snow on ground and in air does affect the bullets path . But got to shoot when i can.
And it seems to me that fine snow workes bether than wind.
One of the biggest problems here is to get good bullets, and they cost 3-4 times what they do in the US, so i hope to finde som that workes soon.
 
No rain

or snow in texas the bad boy's are in the east and they know how to hold!!
 
Caine

i really donno if i could be part of the European Championship in umea, but i'll like to be part of it.

me too have shoot into snow fall on my own range, but too much unespected flyers, and sincerly is not practice or tune section, only a waste of time or , depending on ur mood, a nice shooting day, nothing else.

my modest and personal suggest: go tune and practice in windy days... put 4 or 5 row of flags and see what happens .

Gian aka GLF
 
Caine,I have been trying to keep my opinions to myself these past few months,but being as you are from Norway and probably won't show up at the Super Shoot to beat me up or sabotage my equipment;and being as a collective of BR central experts have already expressed their opinions, may I humbly suggest that you get yourself a BETTER TARGET FRAME THAN A POPSICLE STICK AND SOME WIMPY PAPER !!!!! If your target is twisting and blowing in the wind it's impossible to evaluate your rifle's performance.
Well, back to my "don't offend anybody silence" for another couple months.
joel
 
Caine,I have been trying to keep my opinions to myself .......... may I humbly suggest that you get yourself a BETTER TARGET FRAME THAN A POPSICLE STICK AND SOME WIMPY PAPER !!!!!

Well, back to my "don't offend anybody silence" for another couple months.
joel
Damn Joel, LMAO.......Popcycle stick......LMAOA!!!

(Don't be a stranger, you have a lot to contibute.)

SLMAO!
 
Caine

Here is a little tip that has paid off for just about every shooter that has tried it.
The next time you are at the range, seat you Ultras to where the marks are about twice as long as they are wide. Get a magnifying glass and visually check it. If you do it right, you will be able to feel the bullets actually seat into the lands as you close the bolt.
Try it. I bet your groups tighten up.
If you were shooting a .237 4-groove Krieger, I would also say to get on up into the upper load window with the Ultras. But since it is a Hart, I have no comment as to how it would act with anything above 29.0 grns........jackie
 
Joel, im going to SS and bringnig a big hammer :D:p
Not offended at all, if eny thing that can helpe me im happy!
 
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