Bullet base to ogive ?

[Barrys]

I'm sure it's on here somewhere but I can't find it. Will some of you guys post your common BULLET BASE to ogive measurements for 6mm bullets namely:

Hornady 75g vmax
Hornady 87g vmax
Berger 80g fb varmint
Berger 88g high bc varmint
Berger 87g vld hunting
Berger 95 g classic hunter

Thanks!

 

[Erik Cortina]

What point on the ogive? If we give you base to ogive measurements using our tools it might not translate to your tools since the tools might be different.

 

[bheadboy]

not only are tools different but lot to lot of the same bullet will vary as the MFg have tolerances. and you will the bullet of the same mfg/design of different LOT that vary base to Oj

bob

 

[fguffey]

White Feather, there is your answer, not really, what you have is all the reasons why it can not be done.

The 6mm/243 bullet measures .243", then there are all the variations and the reason reloaders can not give a straight answer.

The barrel has 2 diameters, one is .234" and the other is .237. And then there is a tapper that is 1.5 degrees. The taper give you two diameters. When measuring to the lands, off the lands and beyond the lands I use .237" for the 6mm/.243. When finding the lands I drill the flash hole/primer pocket out on a fired case, I then neck size the case for bullet hold then I remove the bolt and chamber the test case. After chambering the test case I use a cleaning rod to push the bullet out of the case until it contacts the rifling, I imprint the bullet to the rifling.

After pushing the bullet out of the case until it contacts the rifling I can use it to adjust the seating die to .000 off the lands.

Or I can measure the bullet at the .237" datum to the case head:

http://www.saami.org/PubResources/CC_Drawings/Rifle/243%20Winchester.pdf

Will some of you guys post your common BULLET BASE to ogive measurements for 6mm bullets namely

I would use neck tension, problem, I do not have a neck tension gage. I have tension gages, all are calibrated to pounds.

F. Guffey

 

[UltraBR30]

The barrel has 2 diameters, one is .234" and the other is .237.

Never seen or heard of a 6mm/243 barrel with a .234 bore diameter.
Typically the bores are .236 or .237 in diameter with .243 groove diameters.

 

[fguffey]

UltraBR30, you are correct, the 234 should have read 243.

F. Guffey