6x47 lapua help ideas *UPDATE*

[astro]

Ok just re-barreled my Bat action from a 6.5x284 to a 6x47. Brux barrel 29 inch straight tube 7.5 twist. I wanted to shoot 115 Dtacs or 115 Berger. Well 110 shots later and I got crap! I've tried rel 17 h 4350 cci 450 and wolf sr mag primers.
The rifle just won't shoot! I've tried in rifling, jammed in rifling, out of rifling. Any ideas I'm pulling my hair out! From 200 yards It's keeping about 2 inch group, and that's just unacceptable. My next step is to try the Sierras 107. Anyone got any ideas?

 

[Nomo4me]

6x47 lapua help ideas

My load in an 8 twist Kreiger: Lapua brass, 40.5 gr H-4350, 450 primer, berger 108's. Jammed .015" into the lands. 3,150 fps out of a 25.5" bbl.
My redding comp dies keep runout to .003 or less, I don't measure anymore.

Give the 108's a try. We'll assume you are on top of your runout.

 

[basshusker]

6x47 lapua help ideas

2-26" mcgowen 1:8" 39.0 with Wolf SR mags. Bpth 1/4 to 3/8 moa on a bad day with the 115s (they really like the 105s).

What were your loads? What were those tripping the chrono at? Any signs of bullets breaking up from over rotation.

I am with Nomo, might want to try 108's.

Also how many rounds down the tube. I know it is a cut rifled barrel but maybe it needs 50 to settle in? I've had good luck with the Brux's.

 

[40X Guy]

6x47 lapua help ideas

Try the 107 Sierra's, start them at .010 off the lands with H4350 and 450 primers. The Sierra's are easier to tune in my mind with less rounds fired. I pretty much gave up on Berger bullets as I was shooting quite a few rounds and still did not get anything satisfactory in more than one rifle.

Frank

 

[astro]

2-26" mcgowen 1:8" 39.0 with Wolf SR mags. Bpth 1/4 to 3/8 moa on a bad day with the 115s (they really like the 105s).

What were your loads? What were those tripping the chrono at? Any signs of bullets breaking up from over rotation.

I am with Nomo, might want to try 108's.

Also how many rounds down the tube. I know it is a cut rifled barrel but maybe it needs 50 to settle in? I've had good luck with the Brux's.

Haven't even got the crono out yet. As for powder chargers I tried all the way up to 41.0 h4350 and 39.5 rel 17. I'm on my 129 round with barrel breaking and load development. How will the 108 do for f-clas 600yds.
I'm fixing to drive 75 miles to pickup 107 sierra they don't have any 108 berger.

 

[357Mag]

6x47 lapua help ideas

Astro -

Please read your PMs.

Regards,
357Mag

 

[astro]

6x47 lapua help ideas

Update on the 6x47. Finally after 140 shots of testing I found a combo. 357 mag told me to try a slower burning powder rel 22 or 7828, but I had 8 pounds of h4831 so I thought I would try that first with the 115 Dtacs.
First 5 shot group you could cover with nickel from 200 yds, so I tried one more 5 shot and it duplicated. Thanks 357 mag I was going crazy!

 

[dmg264]

any idea what kind of velocity you're getting?

 

[357Mag]

Astro -

Glad to hear of your success, at last !

With regards,
357Mag

 

[astro]

any idea what kind of velocity you're getting?

Should be around 3000. 29 inch barrel

 

[mg]

6x47 lapua help ideas

Try the 107 Sierra's, start them at .010 off the lands with H4350 and 450 primers. The Sierra's are easier to tune in my mind with less rounds fired. I pretty much gave up on Berger bullets as I was shooting quite a few rounds and still did not get anything satisfactory in more than one rifle.

Frank

What powder charge do you use?
The only combination I can get a group from is 38g H4350,107smks, CCI primer.
Anything else gives split groups or flyers :'(

 

[4xforfun]

6x47 lapua help ideas

Update on the 6x47. Finally after 140 shots of testing I found a combo. 357 mag told me to try a slower burning powder rel 22 or 7828, but I had 8 pounds of h4831 so I thought I would try that first with the 115 Dtacs.
First 5 shot group you could cover with nickel from 200 yds, so I tried one more 5 shot and it duplicated. Thanks 357 mag I was going crazy!

Again...what powder did you end up using??