I will give the 6x47 a look. However, I am going to stick with the 6BR.
The gunsmith, building my project, recommeded the chamber be set up for a standard neck 6BR using Lapua brass along with a .060 freebore. This will allow me to shoot the 70grn Ballistic Tip, 75grn V-Max, 87grn V-Max and the 105grn Scenar. I am going to have to seat the lighter bullets out pretty far in order to touch the lands.
I have been reading the Lapua 105grn Scenar has been the most accurate bullet for the 6BR if your using a Krieger 1-8 or 1-8.5 twist, 4 groove, .236 lands barrel. I have a Krieger, 30", 1-8.5, .236 lands barrel, so I am really looking forward to shooting this bullet out of this rifle.
This rifle is going to be heavy and stable. It will weigh around 32 pounds. Here are the specs;
1. 6BR, standard neck, using Lapua brass
2. Nesika Model L, 1.70 Dia Action
3. McMillan Tooley MBR Stock, 5 pounds weight added to rear and front stud for bi-pod use.
4. Krieger, 30", 1-8.5 twist, 1.450 Dia. Straight taper barrel, .060 freebore.
5. Jewel 2oz trigger.
6. Vias muzzle brake
7. Davidson 20MOA base.
9. Kelby 30mm Rings.
10. Nightforce NXS 12x42x56mm NP-2DD or NP-R2 or MLR, I have not yet decided on reticle. I have always used the NP-2DD in the past with great success. I have heard the NP-R2 is an awesome reticle too. I have also, talked to many vamint hunters who are saying the MLR reticle is the way to go for Long range varminting.
As you can see, this rifle will be heavy. There will probably be no recoil due to the muzzle brake and weight of rifle. I could probably go without the brake, but I wanted it on this project. It should be a very pleasnt rifle to shoot, allowing me to really watch my hits and allow me to see my misses.
This rifle will be used for 1000 yard varminting, however, most of the varminting will be done from 400 to 600 yards. I was dead set on having the rifle built around the 6x284, but I decided the 6BR would be the better choice overall.
After studying and investigating this cartridge, it was obvious the 6BR is the most accurate of all the 6mm. I know it's not the fastest 6mm, but I have learned how accurate this cartridge is, so I decided to give up speed for accuracy. Also, I had many varmint hunters, individuals on his site and gunsmiths tell me the 6BR is a great cartridge for varminting.
Another reason I decided to go with the 6BR, was because of what past 6x284 owners were telling me. They basically said they wish they would have chambered their rifle for the 6BR instead of the 6x284. It was pretty overwhelming the responses I was getting from other shooters regarding this topic.
Many varmint hunters said once they switched to using the 6BR for varminting, their hits on target increased dramatically. After hearing and readng about this, I was pretty much sold. I am looking forward to shooting the 6BR, it will be my first.