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Tensioned Barrel 6Br DONE!

Well, it only took three years to get this rifle where I want it! It started it's life as a model 112, stainless single shot in 300 Win Mag. I was building it for 300 and 500 yd Egg Shoots we hold at my local club, plus I'd take it out to Montana for 1000yd PD shoots.

The barrel was the original flutted stainless barrel under a 6061 Aluminum shroud. The muzzle was threaded for the muzzle brake/tension device.

As a 300WM it shot OK, but not great. Three into one hole and then a couple fliers. For no reason, other than something to do, I chambered it to 300 Ultra Mag. This chambering shot terrible. It would have been fine for a hunting rifle, as it shot under 1" all day long, but not good enough for eggs.

Since our Egg Shoots require a "Factory" rifle to have a factory barrel,and believe it or not, at the time, this rifle would be considered factory, as we "shoot barrels against barrels") I sourced a 243 stainless flutted barrel from this list and chambered it to 6mm Ackley. This combination shot GREAT! Five shotts under 3/4" at 200 yds all day long1 With a factory barrel.........But a few of the boys suggested that I might be pushing the rules a wee bit to shoot this "thing" against stock Remingtons and Savages.......I had to agree.
So since I would now be shooting against the likes of Kreiger, PacNor and Shilen, I ordered up a brand new Kreiger 6mm barrel and converted it once again......This time I wasn't going to experiment with cartridges. I'm going for the win! So I went with a 6BR chambering...........Tried and true.....No muss, no fuss!
The rifle shoots amazingly well as a 6BR. With 31.5g of Vit-135 under any 65 gr Moly FB bullet, I'm getting one hole groups at 100 and under 1/2 at 200yds!
The rifle rides the bags better than any rifle I have at the moment.............
I'm not sure why it shoots so well, or if I had simply rebarreled using the Kreiger if I'd get the same results but I think there are some things in play here......
#1...The bedding....The action totally floats. From the recoild lug back, nothing touches the stock. The tension tube is the only thing touching the stock. Very sinilar to a barrel block.
#2....No heat mirage off the barrel. You'd have to do an aweful lot of sustained firing to get the tube to heat up any.
#3....The barrel nut/muzzle brake is tightened and loosened to tension the barrel. I believe this acts as a barrel tuner. Although I haven't seen much difference in accuracy as I tighten and loosen it.
So there you have it! It will be interesting to see how she does at the first egg shoot.

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More pictures in the photo album under "Bang"
www.rvbprecision.com
 
Roy,
I have been admiring this rifle on your web page for some time. I have been waiting to hear how it shoots, and thought the idea behind it just made a recipe for a superbly accurate system. Excellent job, and a beautiful looking setup as well. You have been kind enough to add me to your email list in the past, and one day I intend to get to one of the egg shoots. Good luck with your projects, and keep up the experiments.
Mike Suhie
 

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