Accuracy node with 6mm BR

[strut64]

I need some advice/help with getting to a higher velocity load. I have a low velocity load that is really proving to shoot very well but when I try and ramp up it won't group well. Here is my current detail;
* 110 Savage
* 6mm br Shilen match barrel with 8 twist - about 125 rounds
* Lapua Brass previously fired a FL resized
* CCI BR4 primers
* 105 Gr Berger hybrids seated to lightly touch the rifling.
* Varget powder - approximately 28.3 gr
* getting results of 025" and getting better as barrel breaks in.
* I plan on getting Chronoagraph results as time permits.

I have tried both Varget and H4895 at 29.0 to 30.5gr and get erratic results.
If I try extending the range to 300+ yards higher velocity would be desirable.

I would appreciate some ideas ands thoughts on this issue.

 

[ShootDots]

Do you have any VV N150 OR N540? These powders WILL get you the accuracy and the velocity you are looking for..

 

[Quickoz]

Try jumping the hybrids longer. A mates Dasher has them jumping 50 thou. My 6x47L jumps them 40 thou.

 

[gotcha]

Hard to predict where your rifle might "come together". Bergers also like to be jammed in my experience. I've never tried a .050"+ jump but intend to give it a try. Bergers site has tips on the long jump load work up.

 

[letronshootit]

We have the same barrel on a Savage PTA, use 30gr Varget, same Hybrids, brass, and primers. In our gun the bullets like to be jumped .040 or .020 off the lands. It will shoot just keep working on the seating depth.

 

[strut64]

Correction on original post. Accuracy is NOT .025" - typo. I meant approx 0.250 moa. Here is my path forward. I have been holding off getting the stock pillared and bedded. So that is the next step. After I retest performance after stock do-over, then working on bullet OAL/seating depth. Step three will be lighter different bullets. About getting VV powders, I think Unobtanium would be easier to get. Hey guys - thanks for the input.

 

[snakepit]

We have the same barrel on a Savage PTA, use 30gr Varget, same Hybrids, brass, and primers. In our gun the bullets like to be jumped .040 or .020 off the lands. It will shoot just keep working on the seating depth.

My load is just about the same as this one.

 

[DennisH]

My 6br and BRX loves 107 Sierra Match Kings. I have tried just about every other bullet out their. JLK's did pretty good as well.

The two rifles above are the only two I have that prefer the 107 smk's. Best groups are around the 30.0 grn area for the Br and 33.0 area for the BRX.

 

[fm1947]

Shilen barrels are a bit tighter slow they may run slower.

 

[Hoier]

It's all about how fast they are going but I think your powder charge is a little low to be in the 2850-2870 range. This is where both of mine have shot good. And I think the 3rd one is right around there to. I have had best luck with the hybrids just a hair in the lands.

 

[cocopuff]

my question,is what distance are you planning to be shooting
most of the time...I am using 68 gr bergers with a jump of a few
thousands..And H4895....Shooting about an inch at 250 yards

 

[fm1947]

I could only get 28.5 or 29 grs of varget tops out of my 6br shilen on savage action, and they shot well 1/4 moa, with out signs of pressure, its a tighter slower barrel.

 

[amamnn]

I'm trying to justify the claim of finding an accuracy node with "erratic results" --maybe I'm just stubborn but to me erratic results means I have not found the node. If I do not find a node with a rifle I start looking at other factors like my barrel/action setup or my wind flag reading skills or lack of them or several dozen other things. The node depends upon of all these things. What might work well with a certain bullet/neck tension/jam/jump/balance/etc. etc. may not work with the next barrel/bullet .................etc.etc.etc.

Also as a general rule with short range BR type shooting is is pretty much axiomatic that the load that shoots the best at the longest range is going to do the best at the shortest range too. This may not be true 100.00000% of the time but 99.9999% is good enough for me.

There may also be a problem, as many folks say, in trying to shoot teeny groups at short range using what is essentially a long range set up. I.E. a fast twist heavy(long) bullet with a boat tail, as the yaw and pitch do not settle out until after the 300 yard mark has been passed. I have had this same experience with two rifles that I had expected to be shooting on our club's 600 yard range that never was built. After rebarreling and modifying the loads appropriately, they shot well on the 100 and 200 yard ranges.

 

[fm1947]

strut64

I just got a new shilen varmit contour small shank 6br 1/8 twist, I first shot one round no sign of copper fouling s shot a few more same thing.

I then started a 27.4 varget, up to 29.4, I did 3 shot groups at at 28.2 the group got close and 28.5 even better at 29.1 it opened up and 29.4 even more, so today if it doesn't rain I have loaded 28.2 five rounds and 28.5 five rounds will see how it does and then I will check the speed with chrony, as a well known shooter told me accuracy trumps speed.

The bullet is a BIB 108gr BT, starting at lands.