6BRA load data

[EricF]

As I posted above, N140 is identical to Varget speeds for me. Also, it's in stock at Powder Valley right now!

 

[Capt. Oblivious]

It hammers in a Dasher as well

 

[Ccrider]

I took my vapor trail barrel out for a test drive yesterday. I believe I see the path forward.

How many fouling shots had been fired before shooting the gr? Curious as to whether the barrel was settling down or if that is just the tune window.

 

[Ccrider]

Neat. Just following trying to learn. Is first shot 2879 or 2849 fps? Wonder how close the ladder will repeat.

Will be interesting to see what happens further out. Looks like red and blue want to shoot the same if the horizontal was wind induced.

 

[Wild Willy]

" i am actually looking at the overlap of red over blue "

I'm still learning but I'd load a seating depth test at 30.5 or go above 30.8

 

[DHuffman]

I'll probably load 30.5 , take them to 500 yards and see how it prints.
Thx fellas

On the seating I like to test powder at .006" in from off. Seems the optimum seating depth is almost always in that .003" in to .009" in.

30.5 would be a good place to test seating

 

[Alex Wheeler]

We normally go .005 for a coarse seating test and .001 or .002 to fine tune.

 

[JFrank]

We normally go .005 for a coarse seating test and .001 or .002 to fine tune.

Using the seating data that came with the rifle, I'm at +025 (1.823 ) although with .002 NT the rounds are soft seating to 1.806 as per an ejected dummy round.
I'm not sure if that's good or bad yet.

 

[GlennK]

Using the seating data that came with the rifle, I'm at +025 (1.823 ) although with .002 NT the rounds are soft seating to 1.806 as per an ejected dummy round.
I'm not sure if that's good or bad yet.

You may get fliers with soft seating at a grand. I would use the dummy round seating depth and work from there. Any variation in neck tension will give you a different seating depth.

 

[JFrank]

Hell I got flyers at 500 yesterday'
I'll drop a bushing size and hit it again.

Thanks fellas

 

[Link]

Hell I got flyers at 500 yesterday'
I'll drop a bushing size and hit it again.

Thanks fellas

Q- will a little more jam do the same thing, as long as you're not at full jam?

 

[Bc'z]

I'll probably load 30.5 , take them to 500 yards and see how it prints.
Thx fellas

Jim given issues with components lately try loading just 2 each at depths in .001 increments
I saw Dave's last few targets done this way. Very telling in the results.

On the seating I like to test powder at .006" in from off. Seems the optimum seating depth is almost always in that .003" in to .009" in.

30.5 would be a good place to test seating

 

[JFrank]

I had a good conversation with my friend that built the rifle, we feel that for whatever reason our components and tools have a tiny variances between them . One thing we have determined is to get on a bushing that will hold the depth and not soft seat.
I switched from a 263 to a 262 bushing , now I can close the bolt then extract a dummy round without issues.
J

 

[Alex Wheeler]

Those really deep seating depth windows are very wide. IF your barrel likes .025" in the land, my hunch is it will shoot at .020 in or even .018 in just as well. I would certainly test that range. Seems that most barrels end up liking around .005-.010 in if I had to pick the most common area, but when you get one that likes the .020+ in area they seem to really be consistent.

 

[Rat Rifle]

Can one be .025” in without being hard jammed ? New rifling is sharp, worn leads-not so much. I guess it depends ?

 

[Alex Wheeler]

Its depends on the surface area of the lands, width and number of lands. How well the bullet ogive matches the lead angle and seating force ( I did not say neck tension).
The more surface area of the land, the closer a bullet matches the lead and the lower the bullet seating force are all things that reduce jam length. Generally the way we run these 6mms .025" is no problem but you will see them soft seat before .030 in most case. In the .338s you cant get past .015 usually. So you will need to test this for each combo.

 

[dbduff]

very nice shooting, hope to do that well at out next match!!!!

Still liking Alpha brass? Seems real consistent to me in a Dasher.

 

[JFrank]

My table manners suck, but it looks like this smaller bushing puts me on the right track anyway.
Left group are foulers
500y
30.5 H 4895
Vapor trails at +025
Lapua brass
450 primers

 

[Wild Willy]

Seating depth test at 600
108 Berger
30.8gr VV N140
Lapua 2x fired
BR4

 

[Jet]

Try jumping those 108s a bit more. You might be surprised.