Another .260 Rem build! **Disapointing range report**

The green stocked rifle isn't mine, it's another member who posted his. The whole rifle was done by ATRS including the bedding.
 
As mentioned, try H4831 (Regular and Short Cut) 45-48grns

shockman shoots 45.5 or 46.5 of the Regular in his behind 140grn Berger VLD's (with a 28" Barrel) and I run 48 of SC in mine behind 142grn Sierra MK's (again with a 28" barrel) both using CCI BR2 primers and Lapua .308 cases necked down.
 
Try

4831SC, although I have a AI version, it sprayed the bullets with 4350 ( worse than yours) and i tryed rl17 which tightened it up somewhat and then when i went to 4831SC, Bingo.

I have a thread posted a while back.....

about 3 pages down, it loves 139gr scenars and 49.7gr of H4831SC. Compressed load. See last page of thread for a pic.
 
I've got some H4831sc, I'll give that a try.

I'm just very surprised at the results. I was also developing a load for the 120gr TTSX in my other .260 Rem, with a factory light mountain contour and a VXII 2-7X32. I was using H4350, H4831sc, H414 and RL19 doing the same procedure. None of my 5 shot groups of different loads with those 4 powders were as big as the smallest group with the "precision" rifle!?!?
 
TTSX are hunting bullets and they don't care where they sit in relation to the lands. It isn't the barrel. It is the powder and the seating depth. Just keep at it. You may wish to try an assortment of bullets, but the 142SMK or the 139 Lapua work with everything.
 
bcsteve, very nice looking rig.

I have had the pleasure of shooting several of Ted's 6.5's before moving to Shilen. They have all been fine shooting barrels (1 was very temperamental but got resolved eventually).

I found Lapua 139gr Scenar and Berger 140gr VLD to shoot the best in my rigs. MK and AMax didn't work well but no where near what you are posting for groups.

H4831SC for sure. Lit with a CCI BR2 primers in modified 308 win brass (6.5 Mystic - think a fat 260 improved).

H4350 never worked.

I would fully expect to see 5rds groups in the 1/2" to 5/8" range at 200yds once you get the load sorted out.

Jerry
 
Just checked the action, base and rings. All screws are tight. Finger crossed for picky about powder.
 
Kelly Timoffee said:
Just curious, why are some so quick to think the rifle is at fault???
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Speaking for myself, having hung over a dozen match barrels on 308's when I was shooting XC and a bit of TR, I have never seen a quality rifle shoot groups like that.

I used to break in barrels with whatever I had on hand (often Mexican Match or straight LC ball) and would have been shocked to see a four-in and one-out group, especially that large.

Granted, a 260 has a higher (or is it lower?) expansion ratio, as well as longer relative bearing surfaces than a 308 to cause 'finicky-ness' in loads, and maybe I was spoiled with tight chambered 308's that would shoot little groups with a pointy bullet loaded over a case full of bread crumbs, but I will still be surprised to see that rifle go from a 2 moa gun with four-in/one-out, to shooting cometitive groups by simply changing powder or varying seating depth. I hope I am wrong.
 
If I read the post right bcsteve didn`t shoot a group of 5 rounds loaded the same, but a ladder test. Shots 1 through 5 denote a round loaded with progressivly higher charge weights, in this case each shot being .5gr heavier in powder than the previous. Expecting the group to be sub moa would be a bit of a stretch. Rather he is looking for a node in there somewhere that the rifle seemed to like. In each case it appeared to me he should work on something around charge weight number 4.

I`ve shot 10 round ladder tests that push 2 MOA, but once I found the right spot and tweeked it a little .5MOA was easily obtainable.
 
Cappy said:
If I read the post right bcsteve didn`t shoot a group of 5 rounds loaded the same, but a ladder test. Shots 1 through 5 denote a round loaded with progressivly higher charge weights, in this case each shot being .5gr heavier in powder than the previous. Expecting the group to be sub moa would be a bit of a stretch. Rather he is looking for a node in there somewhere that the rifle seemed to like. In each case it appeared to me he should work on something around charge weight number 4.

I`ve shot 10 round ladder tests that push 2 MOA, but once I found the right spot and tweeked it a little .5MOA was easily obtainable.
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Correct. I wasn't expecting sub MOA but I was still expecting a smaller group. I usually do when I do the same thing with my hunting rifles with hunting loads. Maybe my rifle is picky or match bullets are or both.
 
There is a very real chance that your node is within a 1/2 gr range and you have simply shot through it.

That is why I came up with a different version of the ladder test.

You can visit my website and look in rifle tech. The premise is the same but because you shoot 2 rds, it is very obvious when you are approaching, on and leaving a node.

There are simply too many opportunities to make an error in a single shot which can really change your results.

have a read, give it a try. Dozens of rifles have been tuned over the last 10yrs using this method and it always works. Narrows down your load tune very quickly so you can do larger sample size groups only around the charges that make sense.

Jerry
 
Cappy said:
If I read the post right bcsteve didn`t shoot a group of 5 rounds loaded the same, but a ladder test. Shots 1 through 5 denote a round loaded with progressivly higher charge weights, in this case each shot being .5gr heavier in powder than the previous. Expecting the group to be sub moa would be a bit of a stretch. Rather he is looking for a node in there somewhere that the rifle seemed to like. In each case it appeared to me he should work on something around charge weight number 4.

I`ve shot 10 round ladder tests that push 2 MOA, but once I found the right spot and tweeked it a little .5MOA was easily obtainable.
Click to expand...

wow, i should read entire posts before replying!!!

Good luck Steve, nice rifle!
 
I gotta say, I would load about 46 grains of 4831sc behind the 140 grainish bullet (seated to touch the lands)I had on hand and shoot it. If the rifle didn't shoot at the level I expected, I'd take it apart to find out why. If there was a little vertical, that would be the time to adjust the load or seating depth etc.
BTW, that's a nice looking rifle. Regards, Bill.
 
My 6.5mm Ted barrel is picky what it likes also. Out of all the rifles I have had with Ted's barrels, this one has been the hardest to get to group.

Mine is a 6.5mm-300 Win Mag & it shoots best HOT. 80gr H870 & 140gr Accubond will give me pretty consistent cloverleaf groups around 3300 FPS, but brass life is not good.
I dropped the charge down to get better brass life, but the groups opened up till I got to 77gr H870 which puts me in the 3100 FPS range. My brass life is good now & I am getting basically the same accuracy I was at 80gr after I played with the seating depth a bit.
It was a struggle & frustrating to get to this point though ;) Oh well, the deer won't feel the 200 FPS difference :D

_JAY6606.jpg
 
what he said

Leeper said:
I gotta say, I would load about 46 grains of 4831sc behind the 140 grainish bullet (seated to touch the lands)I had on hand and shoot it. If the rifle didn't shoot at the level I expected, I'd take it apart to find out why. If there was a little vertical, that would be the time to adjust the load or seating depth etc.
BTW, that's a nice looking rifle. Regards, Bill.
Click to expand...
 
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