Bullet Sorting Methods

[Colnagotex]

As it relates to long range accuracy and precision, which measurement has the greatest impact when sorting?

BTO, Bearing Surface, or something else?

What tool are you using to accomplish this measurement with the greatest ease and repeatability?

What results have you achieved by doing it this way?

Thanks for your time.

 

[BP1]

Bob Green bullet comparator.

 

[Colnagotex]

Bob Green bullet comparator.

Thanks BP1

 

[Bart B.]

Bullet balance.

Hard to measure because they have to be spun at least 30,000 rpm to sort the wobbly ones from the perfect spinning ones.

Bob Greene's comparator is a good tool. You'll need to keep the spread across case headspace to. 001" or less for it to be worthwhile. The spread in case headspace gets transferred to bullet position in the freebore and throat. That spread also gets transferred to head clearance; the space between bolt face and case head. All because the case shoulder is hard against the chamber shoulder, not the bolt face, when fired.

 

[Southern shooter 59]

I used the Sinclair bullet comparator to begin with, then I bought the Hoover bullet pointing system and the trimmer has a notch that your caliper clamps into and measures the same thing much easier. With Berger match bullets I haven't seen much variation, but some other brands vary greatly.

 

[ClassCat]

Focused oscillating magnetic field sensor using eddy current measurements

An X-RAY of the bullet in short, and yes ,i own one

It's not a Juenke

 

[Richard Coody]

when i sort i sort by weight first and then by bearing length.

bergers are pretty consistent. hornady not so much. it is an enlightening experience. explains some of those unexplained flyers.

now i use bergers exclusively for target bullets and just sort out the true oddballs.

if you want to take it to the extreme get you one of these Vern Juenke Machine.

 

[JRS]

Buy BIB bullets and forget about bullet sorting

 

[fguffey]

That spread also gets transferred to head clearance; the space between bolt face and case head. All because the case shoulder is hard against the chamber shoulder, not the bolt face, when fired.

And then you claim the firing pin shortens the case as much as .005" when it hits the primer and someone should ask: " How much time does all of that take?" I have killer firing pins, my firing pins crush the primer before the case, powder and bullet know their little buddy has been hit and you think everything takes off for the front of the chamber before the primer is busted. And I ask; "How long does that take?".

F. Guffey

 

[fguffey]

http://www.transcat.com/mitutoyo-510-131-510-131

It is possible everyone has one of these but I never read about anyone using one.

F. Guffey

 

[Bart B.]

And then you claim the firing pin shortens the case as much as .005" when it hits the primer and someone should ask: " How much time does all of that take?"

Firing pins a few ounces weight take 2 to 3 milliseconds traveling 9 fps to fire the primer.

 

[Dusty Stevens]

http://www.transcat.com/mitutoyo-510-131-510-131

It is possible everyone has one of these but I never read about anyone using one.

F. Guffey

real bullet sorters and makers use one on a daily basis

 

[Willie]

#1 Weight sort, if other than Berger
#2 Base to ogive sort
#3 Bob Green comparator

With Bergers, I'll check 25 or so, then just load and shoot the others in the lot. Saves a lot of time and if there's errors, it's normally me.

 

[dkhunt14]

Buy BIB bullets and forget about bullet sorting

All bullets need checked. I don't care who makes them. For long range you need to at least get rid of the few odballs. It might only be one in a 1000 but they are there. Matt

 

[JEFFPPC]

dlhunt14 is correct, as always. Bob Green comparator.

 

[fguffey]

What makes the bob green better than others? More than just the digital readout?

There is a chance the Bob Green is considered the best because no one has the 510-131.

http://www.transcat.com/mitutoyo-510-131-510-131

 

[dkhunt14]

There is a chance the Bob Green is considered the best because no one has the 510-131.

I don't see how that would be used to measure bearing surface or would be faster them a dial indicator on a granite stand. Matt

 

[Loggins J]

Buy BIB bullets and forget about bullet sorting

Buy EPS bullets you don't need to sort them I don't any more it nice not to have to do all that sorting any more.

 

[Terry]

Buy EPS bullets you don't need to sort them I don't any more it nice not to have to do all that sorting any more.

Not my experience.

 

[dkhunt14]

Buy EPS bullets you don't need to sort them I don't any more it nice not to have to do all that sorting any more.

I have sorted many thousands of bullets, some from the very best in the country. I don't care who makes them, they need sorted. Some are really good and you don't find many, but I have yet to find any where they were perfect. This post is not to flame anybody but examples are Barts, Carturuchio, JLK (both Jimmy Knox and the current owner), Knight, Vapor Trail, Spencer, Sierra and Berger. They all have ones in that are different. Sometimes the difference isn't much or many per 1000 and sometimes they can be bad and high in numbers. Matt