Bearing surface comparator tool

[marwitz89]

Does anyone make a good bullet bearing surface comparator tool? David Tubb used to make one but is no longer available.

Thanks,
Joe

 

[Scott Harris]

You can buy a base from Sinclair. Anyone handy with a lathe can make you one.
Scott

 

[BillPa]

Just use to two Hornady bodies and two inserts, one on the rear portion of ogive and one on the heel to eliminate any variations of the base in the measurement.I make them both .002" under the bullet shank diameter.

Bill

 

[DennisH]

Accuracy One

http://www.accuracyone.com/products/bullettipping/

I have also used Bill's method and it's pretty reliable.

Dennis

 

[johara1]

Call Mark king the smith, listed here on this site he has the best one…………. jim

 

[PMA3]

+1 to the Buhay Comparator that Mark King sells.

 

[lawrence97]

Bob Green has one:
http://greensrifles.com/site/mobile?url=http%3A%2F%2Fgreensrifles.com%2FNew_Products.html#2784

 

[dkhunt14]

I went to site for Bob Green and that tool can't measure true bearing. It can only measure bearing to base. I think Marks is better and is made from the guy that made David Tubbs comparitors. Matt

 

[deadwooddick]

Bob Green has one:
http://greensrifles.com/site/mobile?url=http%3A%2F%2Fgreensrifles.com%2FNew_Products.html#2784

Bad Link ! Try this (works for me)…

http://greensrifles.com/New_Products.html

 

[Erik Cortina]

Bob Green's comparator does not measure bearing surface.

 

[tenring]

Just use to two Hornady bodies and two inserts, one on the rear portion of ogive and one on the heel to eliminate any variations of the base in the measurement.I make them both .002" under the bullet shank diameter.

Bill

That is similar to what I use; excepting I bought from Sinclairs the Davidson's nose pieces (two each caliber) and attach them to the caliper. In fact, with the Davidson base and one nose piece per caliber, I am also able to accurately measure seated OAL to the ogive.

 

[BillPa]

That is similar to what I use; excepting I bought from Sinclairs the Davidson's nose pieces (two each caliber) and attach them to the caliper.

I make my own inserts (bushings, thingies?) bored .002" under the bullet shank diameter using steel, brass or sleeve and bore the aluminum originals Why .002"? Dunno, I figure its close enough to get a comparative number.
I use the same bushings to measure the COAL to the ogive on loaded rounds.

Bill