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Kelly Timoffee

Kelly Timoffee

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Ok guys, wondering how you would tackle this ones.

7mm-08, 139 SST's, WIN 760 powder, 26" Krieger varmint barrel .COAL 2.800.
Rifle's chamber is reamed for that seating depth and bullet.1 in 9 twist. Brass was full length sized.
Groups were 1.5" to 3" at 100 yards. Powder weights for test were 43, 43.5, 44, 44.5, 46, 46.5, 47 , and 47.5 .The 43grn load gave me the 1.5" group. the rest were on average 3".

what would everyone be changing first????
 
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First up would be the bullet for me. I tried those in a couple of calibres and got poor accuracy and moved on. If you want a tipped frangible bullet try the nosler ballistic tip.
 
I had good results with them, using H4350. I'll also second Martins suggestion of BT's though. They've always shot well in any rifle.
 
When developing loads, i start with the bullet and try diff. loads with the bullet that shows the most promise. I had a .222 Tikka which would only shoot Nozzler Bts, and wouldn't shoot v/max at all.
 
This is a new rifle, approx 70 rnds through it so far.So there has not been a good grouping yet. With the factory barrel i could do MOA with my loads , i wanted to improve to get sub MOA and better down range accuracy.

when using my factory barrel that I had before the work was done my two trial loads were H4350 and 760 WIN with these bullets, that rifle preferred the 760 for accuracy, I had some of those loads for break in with the new rifle.Then i started my load development with the same bullet and the above mentioned charge weights to try find a starting point to refine from, I have other bullets and I am not opposed to using different bullets at all. Maybe this new barrel and tuned action will need a totally different configuration. Just expected to see a bit better results, even with untuned loads, my break in groupings were 4 to 5 MOA.
 
Has the rifle been bedded? Too many people spend money on new barrels when the real culprit is bedding. Suggest you try another bullet weight, or two. If it shoots poorly, then you should get the rifle (re) bedded, before you waste too much time and ammo.
 
it is bedded, barrel is floated, trigger is worked, 700REM action trued, Krieger barrel, warne base, burris rings, zeiss scope , not sure I can tell you much more about the rifle, I am not surrendering to it being the rifle, I have done things properly in the construction of this thing, I have researched and taken my time, allowed only reputable and recommended hands touch it. The barrel was chambered with a dummy round so there won't be an issue with the seating being too out of whack. With the profile of the Hornady bullets i cannot get them to touch the lands while still being held slightly by the cartridge neck, i CAN test the seating depth with other bullets, just not these. As for testing the bullet depth with a dowel through the end of the barrel, I can hold a bullet against the lands, check the depth, then chamber a round check the depth( from the muzzle again with the dowel) marking on the dowel the difference, and there is no measurable difference during this test, so I am figuring that the bullet is damn close to touching. I cannot think of anymore!!
 
With the profile of the Hornady bullets i cannot get them to touch the lands while still being held slightly by the cartridge neck, i CAN test the seating depth with other bullets, just not these.
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So seat a bullet extra long so that the bolt won't close,then seat it .005" deeper at a time until you can close the bolt with no more resistance than chambering an empty case.
 
This is the problem I am having is exactly with this test/check, the lands won't push the bullet at all into the case with the Hornadys, when I did this with the Nosler's I did exactly as you said.With the Noslers i got it to NOT close and then set it deeper and deeper until i just barely saw the marks on the lands on the bullet and chambered nicely, that i covered in ink. I just think I am already behind the eight ball with the Hornady's , I haven't been reloading for that long, so maybe i am making big errors here.
 
The single most accurate bullet in my 7mm-08 was the regular Hornady 139 gr. In front of RL19 it would give me 1/2" groups regularly. Sadly, when that lot was used up I could never duplicate that load. Close a few times but no cigar. I would try a different bullet first. Is there any particular factory loads you have tried that your rifle likes? What bullet do they use, and at what velocity? - dan
 
That is what I am thinking is bullet, The groups had very little change between powder loads , back to Dan's post, this is a new load development for a new barrel , so I have that obstacle of no good load to reference back to. I think what I will try is the Noslers as i can determine with them how far off the lands i actually am.At the very least I can record those changesn depth
I have Hornady SST's of 154 grain on hand, if i want to go heavier with same bullet profile, I have some 140 grain Accubonds which will seat nicely into the lands. Also some Scirocco's 140 grain to try. I can't see it being the 760 powder, you can tune that stuff to shoot out of anything from what I have seen.
 
Well I made up my loads of Nosler's and Hornady's , I measured every cartridge very carefully as they came out of the press . The Hornady's could be +/- .006" seating depth difference, the Nosler's were +/- .001"
Normally i check every 5 or 10 rounds but tonight i decided to check everyone since I am having this trouble. Not sure how much of a difference it actually makes but I don't find much confidence in what is happening . I did adjust all bullets till I had them seated proper. Any other thoughts here??
 
Kelly Timoffee said:
it is bedded, barrel is floated, trigger is worked, 700REM action trued, Krieger barrel, warne base, burris rings, zeiss scope , not sure I can tell you much more about the rifle, I am not surrendering to it being the rifle, I have done things properly in the construction of this thing, I have researched and taken my time, allowed only reputable and recommended hands touch it. The barrel was chambered with a dummy round so there won't be an issue with the seating being too out of whack. With the profile of the Hornady bullets i cannot get them to touch the lands while still being held slightly by the cartridge neck, i CAN test the seating depth with other bullets, just not these. As for testing the bullet depth with a dowel through the end of the barrel, I can hold a bullet against the lands, check the depth, then chamber a round check the depth( from the muzzle again with the dowel) marking on the dowel the difference, and there is no measurable difference during this test, so I am figuring that the bullet is damn close to touching. I cannot think of anymore!!
Click to expand...

Some barrels work well when free floated, other barrels do not. While you are at the range, try this. Fold up a small piece of paper, thick enough that you have to pull the barrel a bit, to get the paper between the end of the stock and the barrel. Try a five shot group with the pressure point under the barrel. Then let us know the results.
 
Well i went out today with some different loads. I made up some 154 SST's at 2.8" COAL with charges of 40,41,42,43,44 gr of 760. They grouped average of 1.505" , best was 1.087". I also made up some 140 Accubonds with COAL 2.8" with charges of 43,44,45,46,47 gr of 760, average of 1.498" best was 1.021". I didn't want to start playing with seating depth as i wanted all shells to be the same for comparison. All were 5 shot groups @100 yards. So, would this be an acceptable starting point to fine tune for everyone out there?? PM me and I can send or email the excel data sheet with all info. Hopefully we can refine it from here.
 
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