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Seating depth issues with Hornady Match BTHP

Jayjay1

Gunny Sergeant
Full Member
Minuteman
Oct 30, 2018
980
499
Hello guys,

I´d really like to get this bullet running, but I´m fighting it, because the seating depths vary about .014".

I try to seat the 140gr. BTHP bullet in the 6.5CM.

Brass is from Hornady, uniformed with collet neck sizing die from LEE and neck turned.
Seating die is the precision die from Forster.

To be clear, I had no issues at all with seating any other bullet this why.
Conformance was always king with 8 other bullets I´ve used so far, almost not measurable.

But here comes the BTHP, an affordable bullet with a good BC from a well reputated manufacturer, and this thing drives me nuts!

What´s the matter, am I doing something wrong?
I don´t get it, help will be appreciated.
:unsure:
 
You didn't say if you seat overall length or to ogive. I seat my 6.5 to 2.240 BTO. I find the Hornady ELD-M's have a larger variance that the Sierra Match Kings. Do you have a bullet comparator? I'll bet bullets differ by your .014".
 
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Until you get better tools the age old method is to take an average of 10 or 20 to estimate the average then calculate the standard deviation to see if the average is a good estimate. Both loaded and the same bullets before loading keeping them in order.
That will most likely be the manuacturers tolerance. But like @Jake the dog stated not much you can do about it. Seems he has been down this road before.
 
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I shoot .005 off the lands and get sub.5 moa accuracy. Measure off the ogive and you will lose all that variation. My creeds love this bullet