Question about using a Comparator

[kc0cxa]

I ordered one from Sinclair today but have a question.

Do you go through the whole Max COL for each bullet for that gun then use the comparator to get the ogive number?

Or is there a way to use the comparator with a new bullet (say moving from 168gr to 150gr) without doing the whole COL thing?

 

[Boomholzer]

Re: Question about using a Comparator

I'm not sure what factors drive you against COAL or intent in Q.

Different secant or tangent bullet profiles will give different COAL vs. O-give measurements. The utility is more in seating depth vs bore as COAL differs.

O-give length to lands, against the chamber, will obviously give you jump or perhaps means to null. COAL (over-all-lenth) will give you feed/mag length concerns and varience data against 0-give for *given* bullet. The base and internal seated depth of the bullet will effect case volume and bearing surface in neck. All-else-the-same: max COAL is more a external issue with feeding given seat depth of given bullets against O-give. Any-different: Be aware that with different bullets your affecting both ends. Different bullets don't behave the same in both accuracy and pressure if your after using the tool to make assumptions in kiss with brand-new loads.

It's a better guage to bore vs. COAL that is relative to each unique bullet/load.


HTH
B Safe

 

[kc0cxa]

Re: Question about using a Comparator

Thanks!

That is what I was thinking but I am new to this long range accuracy reloading stuff so I thought I would ask.

I have hand loaded for hunting and handguns for years. But just recently got into the accuracy portion of shooting so this is all new to me.

Thanks again.