Long range tuning

[Nature Boy]

IMHO, there's no real need to use ammonia based copper solvents these days, YMMV.

100%

 

[JFrank]

Which brass are you using?

Lapua, I neck turned and fire formed two hundred cases last winter.

 

[JFrank]

100%

The good part is, the stuff works really well. Just strong fumes.

 

[Nature Boy]

The copper is easy, it’s the hard carbon that’s a PITA

 

[JFrank]

The copper is easy, it’s the hard carbon that’s a PITA

What do you like for carbon removal ?

 

[Walkalong]

JB……

 

[Varminterror]

Lapua, I neck turned and fire formed two hundred cases last winter.

I thought so - Lapua - but I wasn’t thinking and forgot you’d neck turned. I forget, what’s your neck on your reamer? How much are you letting them expand in firing?

 

[Nature Boy]

What do you like for carbon removal ?

Flitz bore cleaner and elbo grease

 

[JFrank]

I thought so - Lapua - but I wasn’t thinking and forgot you’d neck turned. I forget, what’s your neck on your reamer? How much are you letting them expand in firing?

I use a 268 nk and my loaded round OD’s are 2645 ish on this brass ~.0035 bullet hold and clearance.

 

[JFrank]

Just got back from a buddies shop ( he has a bore scope) the barrel I just took off doesn’t have a carbon ring or build up, just a bit along the lands, there is some pitting in the throat along with some fire cracking but not horrible at all.
I may have it set back.
Added . I’ve been scrubbing on this barrel for almost 2 hours with everything I’ve got and could still get traces of black on a patch. I may never get every bit of carbon out of the fire cracking.

 

[JFrank]

I shot this 16 shot ladder at 500 yards on a fresh barrel today, I’m liking this lower node ( DBL) 30.4 however with only 48 rounds total on the barrel I won’t place to much stock on it until it speeds up a tad but it’s close enough for seating tests.
My pal think that 30.9 would be his choice and since he’s the WR holder I’ll go that direction.

 

[JFrank]

After a less than stellar seating test at 30.9, and what I mean by that is I felt the rifle was spitting rounds at varying depths and some very ODD chronograph numbers ( top left is 40 fps) I decided to reshoot my charge ladder at s seating depth very close to the original ( top left) +.008.
I had an opportunity yesterday afternoon to do just that. My high node~ 30.9 is still there but with the now 94 rounds the lower node has shifted slightly to 30.5 and reshot on sight at the red + ( still about 1/4 vertical but overall smaller at 3/4 C-C at 500 yards, now the odd part is those three shots had a 25fps ES ?
Go figure that out ..
That’s all for now, shoot small y’all
J

 

[JFrank]

After a good cleaning and throat measuring,I set up a seating review with the new numbers.
.006 jam and .008 jam, even though the wind was a tad switchy I believe the data is decent.
IMHO the .006 jam is ready to rock.

 

[JFrank]

Our club ( the Montana 1000 ) will be hosting the IBS 1000 yard Nationals again this year, I’m looking forward to participating with more experience and a new barrel this time. Please follow the link for details, come and join the fun.

You are being redirected...

 

[JFrank]

Wow, I’m actually shocked that this thread has accumulated 16,000 views..

I’m humbled and hopeful that a few of my miss steps have had a positive effect on someone somewhere.
J

 

[Nature Boy]

Good luck in the match Jim

 

[LoonWulf]

Good luck in the match Jim

+1

 

[GoldieMI]

Good luck in the match Jim

+1

 

[JFrank]

Good luck in the match Jim

You should come up and shoot with us. You’ll have a blast ‘

 

[horsemen61]

Good luck in the match Jim

Agreed! best Of Luck to You Sir this Thread I find to be highly educational and informative in the best way seems like I’ll end up with either a 6BR or a 6BRA one of these days I hope your new barrel is a sweet shooter

 

[JFrank]

Thanks, I just try to keep up with some of the best shooters in the country. It any easy !
I call this new barrel~ Mr. Small

 

[JFrank]

I got out this morning for a ladder test using VV N140 powder. Conditions weren’t too bad at 10 degrees and dead calm. I call that a shooters paradise.

 

[JFrank]

Here’s 3 separate charge weights with maybe 1/4 in vertical at 500 yards.

 

[horsemen61]

View attachment 1194581Here’s 3 separate charge weights with maybe 1/4 in vertical at 500 yards.

So @JFrank what does that info tell you I am wanting to learn more about this kind of thing?

 

[JFrank]

So @JFrank what does that info tell you I am wanting to learn more about this kind of thing?

Me too’
From this ladder I could load 31.5 and order another jug of N140, ( from the gurus) nodes repeat about 3% so on this test that’s 32.4 and right where the upper overlap is. Myself being a cautious fella I’ll probably shoot on each side of 31.5 to see a repeat.

Thanks for asking.
Jim