Nk turning the 6BRA

[kvd]

What distance?
The further away the target/test is, typically tells me the best story.
Donovan

My local range only goes out to 400 yards so this distance is where I mostly gather my data. We shoot a 1000 yard match once a month but I've never tried to shoot the 6 BRA for this. I think 7mm (7 RSAUM) works better at 1000 yds.

 

[JohnMill]

I am certain that Alex is your best source of info for you as a client 'cause he wants you to shoot a rifle he built well. In the interest of theory; I was started in BR by one gunsmith and several engineers, tool&die makers and machinists and we would sit around in the gunshop and babble. One of the t&d guys talked about turning necks and he said "The main purpose of turning necks is the precise alignment of the bullet to the bore. There are those that believe the throating will do that job but when every force applied to it is forward what would make it sudenly go sideways" . I have found ( in my limited experience ) that those rifleswith the most precisely lined bores and turned necks shoot considerably better than the rest and well worth all the effort.
If it hits off center even a 10th or a 100th it will smear the jacket and continue down the bore that much off.

 

[JohnMill]

When my kids were young they sometimes would get impatient with my explanations and ask me: "What is the simple answer?" My answer was "There is no simple answer, so be wary of simple answers." In the real world the answers are most often multi factorial, and nowhere is that more true than in physics.

I respectfully disagree that "The main purpose of turning necks is the precise alignment of the bullet to the bore." IMO precise alignment to the bore, like concentricity, is a byproduct of good brass prep and reloading process. IMO the main reason to turn necks and anneal brass is neck tension for proper/clean bullet release and hopefully consistent pressure/velocity.

I can prove that statement any day of the week by having very concentric ammo, yet by changing the neck tension I can alter its precision, velocity and POI. I can also do it by changing seating depth and selection of powder. Its multi factorial, no simple answer.

Kindest regards,

Joe

By all means continueTo go your way but disagreeing is not proving. The group that I mentioned was a rare mix. A couple of MENSAs and the others. I was most affected by the if it starts off center, it stays off center as I had considered the throat a centering device myself. It is true there is no simple answers

 

[JFrank]

for .268 neck - accounting for .2435 pressure ring - I trim to .0112. Seated bullet measures just under .266

I’m a tad under Newbieshooter’s posted numbers however they do match the prepped brass that came with the rifle.
My loaded round is .2645

 

[farmerjohn]

@Joe R and @JohnMill , y'all tought me a new word "multi-factorial". After 50+ years of reloading and learning I personally believe that using the logic of "multi-factorial" reasoning, I think that both of you are right, IMHO, John

 

[BoydAllen]

IMO the best neck turner on the market is the Hornady, at around $100 there is nothing else that even comes close to it.

Respectfully, I must disagree. The cutter adjustment is by half thousandths....entirely too coarse for my purposes. Also, experience has taught me that carbide turning mandrels give fewer problems. I have several different neck turning tools, old Sinclair, Stiller, K&M and PMA Tool. For those who want a turning lathe, I suggest you look at the 21st Century Shooting setups.

 

[Brians356]

The [Hornady] cutter adjustment is by half thousandths...

That's not strictly true. Just back out the set screw until no clicks are felt, adjust to your heart's content, then tighten the set screw. It will hold any adjustment you select. [PS in fact it will hold setting in use without the set screw engaged at all.]
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[BoydAllen]

That's not strictly true. Just back out the set screw until no clicks are felt, adjust to your heart's content, then tighten the set screw. It will hold any adjustment you select.
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Thanks for the additional info. I was just going by the video.

 

[Brians356]

Thanks for the additional info. I was just going by the video.

Before buying mine I saw a video that stated relying on the half-thou clicks was an optional convenience. But to my surprise now it's not so stated in the instruction booklet.
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[JohnMill]

tn noshooter, Last month I received my Alex Wheeler Built rifle (6 BRA). Have not shot it yet, but in my conversations with Alex and his many national winners, I am confident the rifle will shoot better than me. Alex is on the cutting edge of the sport and will guide in making the correct neck turning wall thickness decision.

gunsandgunsmithing, I could not agree more with you on precision measuring to the tenth. Another retired journeyman tool and die maker, here. Way to many influencing factors, other than different hands.

Absolutely. So many factors, but when you sit down at the line, having done all the hard work preparing for competition, Ya gotta believe. Otherwise you'll end up second guessing yourself, changing your load, etc. Recipe for disaster.