Inside the Man Cave operation center with inside RKS on the computer screen.  I should have built a bigger shop!

Jack

Its a universal rule that we expand to overfill any space we have available. Am currently trying to "dejunk" my 1600 sq. ft. of 'space' so we can move in the next year or two. Having a tough time and the wife only rolls her eyes and shakes her head. Women just don't understand. 

BPJack the day always seem to arise when its time to get rid of say that piece of plexiglass thats been laying around for years on end. Never fails the day or shortly there after you do it could have been put to very good use at least that's been my own kind of luck. 

JLouis

I'm in the same boat as you Jack! I know I keep the good stuff to use, but then when I need it I can't find it, and I buy more. I also can't toss something I think I'll use later, as I need it as soon as the garbage man takes the cans!

The reason I have two 45 caliber throating reamers is that I forgot that I had the first one!

JS

My highest scores have been fired with an 8 groove gain twist choked cut rifled RKS barrel.

Ron Smith mostly cuts 6 groove barrels and they have been just as accurate for me.

When I started shooting the old timers indicated to me the bullet was more geometrically stable with more grooves. 
Also with more grooves there was less bullet being cut due to the reduced land area (so should reduce the possibility of leading).

I have stayed with lots of grooves but I am not sure what research might exist.

Some British 303 rifles only had one rifle groove and they still spun the bullet sufficiently to stabilize it.

I have never found luck and consistent winning as being one in the same Ken you have to work your Arss off to become good at least I did. If one does not have a real good shooting barrel all that work pretty much  pretty much becomes a waste of ones time as you just can't get there no matter how hard one tries as I have had a few along the way. The most consistent one I have owned to date was a left hand 15 twist Bresien in 33-47 using a 234gr. MOS Spitzer. My 32-40 15 twist Douglas shot just as good but I had to stay on top of the temp. changes to keep it in tune it being a bit more finicky. My 12 twist Douglas 28-35SS is more like the Bresien and does not seem to be finicky at all but you have to stay on top of the conditions quite a bit more so but it's also the more enjoyable to shoot. 

JLouis

My theory regarding barrels and bullets, is that the barrel should distort the bullet, the least possible and still have enough purchase on the bullet, to spin it reliably.

To that end, I have purchased a 3 groove Pacnor barrel, .338 x 14 twist at least a year ago. But, like many things (including my 28 cal Kreiger barrel) I haven't got-round-to installing them.

Pacnor is the only barrel marker that I know of that makes 3 groove barrels. The lands are as narrow as any 6 groove and therefore distort the bullet, 1/2 as much. With a freebore, a cylinderical bullet would be very easy to BS, if it wasn't more that .0005 to ,001 over groove diameter. That would minimized "slump" if it's a problem. But, what ever it is that keeps us from putting every bullet in the same hole, I'm pretty sure (harmonics aside), that it's the bullet distorting somewhere along it's path to the target.

Pacnor's have no choke in them though (I'm a believer that chokes are a good thing) but, not all 250's are shot with choked barrels.

I wonder if Barry ever built and tested 3 grooves? My only worry about 3 grooves, is if they will reliably keep the bullet from shearing but, I have a feeling that they would.

I wonder if Dale Reynold barrel is 3 or 6 groove, does anyone know?

Frank