6BR pressure signs low loads

[Dolomite]

U may need to test up and down from 30.0 gr. a bit to see what the barrel really likes.

2800 don't seem too fast for a 24 inch barrel.

Your rifle will tell you what neck tension it likes. Just experiment the range of .001 - .003 or so maybe a tad bit more to see what it wants to shoot.

Thanks I will definitely give it a try. I’ve been using .001 and the SD/ES were double digit.

 

[Dolomite]

THANK YOU everyone for all the tips, pointers and comments!!!

 

[Albany Mountain]

Well that was helpful.

 

[Lone Hunter]

THANK YOU everyone for all the tips, pointers and comments!!!

Any explanation on what the problem was in case someone runs into the same problem?? Or did I miss the explanation??

 

[Dolomite]

Any explanation on what the problem was in case someone runs into the same problem?? Or did I miss the explanation??

It’s in the original post. Go back to the beginging of the post it states the problem I was having.

 

[Dolomite]

There is no one answer I can give that fixed the problem.

if you read all the comments it lists down the problem and suggestions or comments on how to solve the problem.

I did everything at once or it was already part of my normal routine.

cleaned barrel to bare steel, degreased the chamber, loaded hotter rounds, seated closer to the lands. Unfortunately I did this all in one test, except neck turning. That would have been the final straw.

If I had to guess it had to do with cleaning the barrel or loading hotter and seating longer toward the lands.

I will continue to do all three experimenting with seating depth test. I found the powder node seating the bullet .02 off the lands which shot .2’s. Maybe that’s good enough.

If anyone has any detailed questions I’m more than happy to share what I did if not mentioned in my previous comments.

 

[Dolomite]

Harrells dies pretty much same as Redding and use either Redding or Wilson bushings. Is your chamber a Norma chamber or 6BR Remington chamber? 27 gr of Varget is max for 6BR Rem in the Berger book. Also the velocity for that max load with a 105gr bullet as stated in the Berger book is 2656 out of a 24 inch barrel.
Very similar to what you are getting. Do you have reamer print?

Forgot to answer your question. No I don’t have a reamer print but confirmed with the smith it was a standard 6br reamer with a .272 neck and .120 freebore. Yes I was following the info in the Berger manual which prompted the question on the heavy bolt lift and ejector marks on the brass. It seems like giving the barre a good cleaning loading hotter and seating closer to the lands solved the issues.

 

[Lone Hunter]

There is no one answer I can give that fixed the problem….

That’s what I was looking for. Didn’t know if you ever found out what the problem was. When I first started shooting 6BR I didn’t wipe out the excess cleaning oils good enough and had pressure signs starting low. Cleaned chamber correctly and that solved my problem. Glad you got it worked out. I hate it when some thing goes wrong but you learn by asking and doing.

 

[Dolomite]

There is no one answer I can give that fixed the problem….

That’s what I was looking for. Didn’t know if you ever found out what the problem was. When I first started shooting 6BR I didn’t wipe out the excess cleaning oils good enough and had pressure signs starting low. Cleaned chamber correctly and that solved my problem. Glad you got it worked out. I hate it when some thing goes wrong but you learn by asking and doing.

Sometimes it’s overlooking the small things that might make a difference. Dry clean chamber could have been part of the solution too. It’s all process of elimination. Trial and error.

good thing accurate shooter and all it’s good members are willing to help and share info.

i hope the information in this post will help someone else who is having the same problem.

 

[elk3]

Try a small base die

 

[Dolomite]

Ordered a Harrells die and they sent me a B 2.5. Sized a few fired cases and it’s smooth, sized the shoulder body junction .0005 and the base .001. Runout is .001 max.

 

[JFrank]

You do know that the little brass deally bob is a bump comparator gage right ?

 

[Dolomite]

You do know that the little brass deally bob is a bump comparator gage right ?

Yes thanks I figured it out from other posts.

 

[Dolomite]

What else besides lighter fluid does everyone use? CVS hasn’t sold lighter fluid for years.

 

[Tokay444]

What else besides lighter fluid does everyone use? CVS hasn’t sold lighter fluid for years.

Use for what?

 

[Dolomite]

Use for what?

Cleaning out the chamber.

 

[KMart]

Cleaning out the chamber.

Denatured alcohol sold at the hardware store. Cleans well and evaporates rather quickly.

It may even work in a Zippo.

 

[C.E.Smith043]

I have the same issue with the redding die not getting to the base but I use a forster press so no shell holders to adjust.

It doesn't feel like I have clickers its a heavy bolt lift from start to finish.


Do you think not sizing the base enough is cause the pressure issues of ejector swipe?

I would try a different primer just to rule it out. I was having similar problems with my 25dti using rem 7.5s, switched to fed GM and the problem stopped instantly.

 

[Kracken McGraw]

What else besides lighter fluid does everyone use? CVS hasn’t sold lighter fluid for years.

https://www.homedepot.com/p/Klean-Strip-1-qt-Varnish-Maker-and-Painter-s-Naphtha-QVM46/100122813
I use this Naphtha, others may feel different though.

 

[LRPV]

https://www.homedepot.com/p/Klean-Strip-1-qt-Varnish-Maker-and-Painter-s-Naphtha-QVM46/100122813
I use this Naphtha, others may feel different though.

I’m pretty sure lighter fluid IS naphtha. Walmart, as much as I hate the place has ronsonol. I go there once a year to stock up.