6MM BR 68gr Berger and VV N135 Powder ?

[foxguy]

Hi, I'm new to loading the 6MM BR and after reading a lot of messages here have decided to load up some of the 6MM 68 gr Bergers with VV N135 powder.

I have a Question to those who have loaded with the VV N135 powder. How much of a problem do loaders had with developing a load at say 65-70 degrees, getting excellent group results(say 3/8" minute moa) and then trying to shoot the load at say 90 degrees- was your group size still as good as the results you were getting at the 65-70 degrees?

I should have the VV N135 next week and am looking forward to loading up some loads and testing the loads for good groups.

Savage 6MM BR ,1-8 twist, "F" class 30 inch barrel.

(I will be loading Sierra 107gr bullets in the future with Varget. I just wanted to start with the 68 gr bullets,) 80 gr Berger bullets will also be in my future.


Thanks

 

[foxguy]

Hi all,

I did a search on google on Vihtavuori temperature sensitivity and found a thread on this site talking about Vihtavuori powders sensitivity to temperature changes. The VV N1XX line of powders are a single base powder and are fairly insensitive to temperature changes. The VV 5XX is not a single base powder and is more sensitive to temperature changes.

Google helps me to find answers on subjects I am curios about. Sometimes I just have to do the Search.

Thanks

 

[SS427]

I have a winter and a summer load for my 6mmBR using 135 powder because I found it does make a difference. Winter load is based on temps in the 40-50 degree range and summer load is based on 75 degrees. That is how it worked out for me...but with all rifles who knows until you try.

 

[RonAKA]

Consider that when some think temperature sensitivity they thing ambient temperature changes. The other issue is chamber temperature when you are shooting a number of shots at a range. If you load a round and then let it sit in a warm/hot chamber and cook, then the powder will heat up. Some will put their loaded rounds in a cooler to let them sit at a uniform temperature until time to shoot. Then you only have to worry about how long they sit in the chamber.

 

[foxguy]

RonAKA,

Thanks for reminding us that we also have to be aware of this. I know I usually try to keep my ammo in the shade until shoot time. I may have to start using a cooler to keep the heat off of it ??

 

[foxguy]

Hi, I'm new to loading the 6MM BR and after reading a lot of messages here have decided to load up some of the 6MM 68 gr Bergers with VV N135 powder.

I have a Question to those who have loaded with the VV N135 powder. How much of a problem do loaders had with developing a load at say 65-70 degrees, getting excellent group results(say 3/8" minute moa) and then trying to shoot the load at say 90 degrees- was your group size still as good as the results you were getting at the 65-70 degrees?

I should have the VV N135 next week and am looking forward to loading up some loads and testing the loads for good groups.

Savage 6MM BR ,1-8 twist, "F" class 30 inch barrel.

(I will be loading Sierra 107gr bullets in the future with Varget. I just wanted to start with the 68 gr bullets,) 80 gr Berger bullets will also be in my future.


Thanks

Dang, I went to 2 Large sporting goods stores looking for the VV N135. Neither one had it in stock. (I had called several local SG stores looking for it earlier). Decided if I wanted some I had better get it ordered. I'm thinking I should have it in another week??, I hope that we have some warm days left this fall for load testing.

 

[WyleWD]

Dang, I went to 2 Large sporting goods stores looking for the VV N135. Neither one had it in stock. (I had called several local SG stores looking for it earlier). Decided if I wanted some I had better get it ordered. I'm thinking I should have it in another week??, I hope that we have some warm days left this fall for load testing.

In my experience, N135 is a good powder for the bullets in the 65-75gr range. That being said, have you considered trying 8208? WD

 

[foxguy]

In my experience, N135 is a good powder for the bullets in the 65-75gr range. That being said, have you considered trying 8208? WD

Hi WyleWD,

the 8208 is a powder that I have recently added to my Powder list. I will probably be trying it in the future. Do you have Load Data for berger 68 gr FB bullet using the 8208?

 

[RonAKA]

I started with H322 in my 6BR with the 68 grain Berger bullets. I found it was a bit too fast, and went to Varget. I have some loaded up with 34.2 grains of N135 to see how they will do, but have not tested them yet, and can't comment from N135 experience. I try to hit 3400-3420 fps for best accuracy.

This is an example of three consecutive 3 shot groups I got with Varget. I do not get as good with the 80 grain Bergers. That is the max weight I can shoot with my 12 twist barrel.

 

[foxguy]

I started with H322 in my 6BR with the 68 grain Berger bullets. I found it was a bit too fast, and went to Varget. I have some loaded up with 34.2 grains of N135 to see how they will do, but have not tested them yet, and can't comment from N135 experience. I try to hit 3400-3420 fps for best accuracy.

This is an example of three consecutive 3 shot groups I got with Varget. I do not get as good with the 80 grain Bergers. That is the max weight I can shoot with my 12 twist barrel.

RonAKA,

Thanks for the picture of the Target, and thanks for additional information on your Load testing.

 

[JDMock]

I started with H322 in my 6BR with the 68 grain Berger bullets. I found it was a bit too fast, and went to Varget. I have some loaded up with 34.2 grains of N135 to see how they will do, but have not tested them yet, and can't comment from N135 experience. I try to hit 3400-3420 fps for best accuracy.
This is an example of three consecutive 3 shot grou
ps I got with Varget. I do not get as good with the 80 grain Bergers. That is the max weight I can shoot with my 12 twist barrel.

I would like to hire you to measure my groups in competition. James
The above group is a 5-shot group with a 6mm PPC and it mesures .121 as measured by George Kelbly, Jr.

 

[RonAKA]

I would like to hire you to measure my groups in competition. James
The above group is a 5-shot group with a 6mm PPC and it mesures .121 as measured by George Kelbly, Jr.

Yes, I probably used a nominal .243 instead of a measured single shot diameter. I can't remember...

 

[Gander P]

In my experience, N135 is a good powder for the bullets in the 65-75gr range. That being said, have you considered trying 8208? WD

8208 is my go to powder for my 6br. Consistent, and accurate. It's lights out with a 68 gr. Bart's avenger bullet.

 

[jackieschmidt]

I shoot Accurate 2495 with the Bart’s 65 grn or the Bart’s 80 grn in my 1-12 twist BR. The throat is .060.
33.5 grns with the 80, 34.5 with the 65, jumping both around .020.

I might be the only person in the Country using 2495. I tried it on a whim, and was pleasantly surprised.

by the way. You will find that 135 in a BR acts like 133 in a PPC. It is more sensitive to humidity swings more than temperature when trying to achieve the best agging capability.

 

[JEFFPPC]

25 years when I started in shortrange br I had a 6br. Curious to see if I could compete with the ppcs and to learn I attended the 3 day IBS school. Vv135 and 68 gr Bergers was my load. Until the last group on the third day when I was edged out of top spot I was more than holding my own with a 68 gr and vv135. Built a second br in a 10 twist and used 88 Bergers to do very well at groundhog matches at 500 yds. I like VV135 in the BR case.

 

[Longrange57]

Old thread but I'll make a comment. My 12tw 6BR shoots very well with N135 and Bart's 80 Dom.
6Dasher 8tw I shoot 105 Gungnir at 2980 with Varget.
Just shot these two targets at 300 yd with gusting head/cross wind. Lots of good powders and bullets.
I've become very fond of Bart's bullets and N135 for BR. Shot lots of 1's and 2's at 100 yds.

 

[Longrange57]

Attachments

 

[Bill Norris]

Just now today tested the 68 gr. FB Bergers with 31.0 ,32.0 & 33.0 gr. of VV-N135 seated at .010 off the lands with Lapua once fired cases in my Rem 40X 6mmBR 1 - 14 Tw. 24 inch barrel. CCI BR-4 Primers. Looks like 31.0 gr. is the winner with a 5 shot group measuring .142. 32.0 gr. opened up to .258 and 33.0 gr. was close to that as well.
(CAUTION - WORK UP YOUR LOADS)