Taking your own bearing surface measurement ??

[Aimsmall55]

I was just wondering if this is correct. I've noticed that the 230 otms shoot faster than the 230 hybrid targets out of my 300 win mag. So I was wondering if you measure from metplat to part of bullet that is contacting the rifling. And also from base to ogive. And that will give you your bearing surface for that lot of bullets.

Hence 1.380- .915 = .465 bearing surface.

Is this the proper way??

 

[damoncali]

No, what you need is two of those Hornady rigs, then use them both at the same time - one at each end.

 

[nuclear_shooter]

Follow the instructions here: http://www.snipershide.com/shooting...nd-loading-long-range-2-bullet-sort-prep.html

 

[milo 2.0]

AS,
Whether it's right or wrong, if you measure every style bullet that way, your numbers should coincide, and give ball park figures.

 

[Aimsmall55]

AS,
Whether it's right or wrong, if you measure every style bullet that way, your numbers should coincide, and give ball park figures.

That's kind of what I was thinking. Berger has the 230 hybrids listed with a smaller bearing surface compared to the OTMs. But the otms in this case have a shorter bearing surface. Lot to lot differences I guess. Makes since why the OTM is shooting so much faster.
Thank you miles

 

[Innovative]

Digital Headspace Gauge

Try this:

This tool measures the shoulder clearance that your handloads have in your particular chamber. It ALSO checks the bearing surface uniformity of any size bullet, and it measures bullet jump to the rifling. This is helpful for setting your die height accurately for resizing cases and bullet seating.

 

[Temp9]

That math will tell you how much longer the ogive is than the base. Won't tell you anything about the bearing surface length.