finally learning the importance of seating depth

rockwallraider

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Dec 28, 2007
Messages
293
started reloading about a year ago and have never really messed with the seating depth of bullets, i typically just left them 20 thou off the lands and if it I did not find a good load would assume did not like that bullet. Yesterday I was doing the same for my 6.5 sherman short and for fun decided to try bergers suggestion on seating depth with the 140 vld bullet. glad i did. this particular barrel like the .150 off the lands. No telling how much time I have wasted as I would have never pushed the bullet in that far in the past.



IMG_7372.jpg IMG_7373.jpg




My questions would be are most bullets this sensative to seating or are the vld's that much more extreme?
 

Bigeclipse

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Aug 10, 2012
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1,877
Some are some aren’t. Some barrels are some aren’t. Best answer I know how to give.
this x2. It appears it just depends. Sometimes you get lucky with a barrel/rifle that just seems to shoot well no matter what. Sometimes you get one that is super picky.
 

piute

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Jan 21, 2011
Messages
244
What kind of changes in depth should one take at a time? .010 or more? I will have to try seating changes in my 264 win. I started load @ .015 off getting MOA out to 400 yards. Maybe could be better?
Shooting 143 ELD-X's , if anyone wants to share experience.
 

Andrew Massi

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Jun 4, 2018
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Lincoln Ca
started reloading about a year ago and have never really messed with the seating depth of bullets, i typically just left them 20 thou off the lands and if it I did not find a good load would assume did not like that bullet. Yesterday I was doing the same for my 6.5 sherman short and for fun decided to try bergers suggestion on seating depth with the 140 vld bullet. glad i did. this particular barrel like the .150 off the lands. No telling how much time I have wasted as I would have never pushed the bullet in that far in the past.



View attachment 153565 View attachment 153566




My questions would be are most bullets this sensative to seating or are the vld's that much more extreme?

Vlds are typically very sensitive to seating depth
 

Mach 1

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Jan 11, 2018
Messages
652
Depends on the design on the bullet. Secant ogive bullets like modern vld bullets tend to be less forgiving and are nit picky about seating depth. while tangent ogive bullets are not as picky on average. I’ve found hybrids tend to take after secant ogive bullets when it comes to seating depth. I’ve also found some bullets won’t shoot well unless they are jammed. I try to stay away from those loads for the most part but some people have great luck with them.
 

MagnumManiac

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Feb 25, 2008
Messages
2,400
I find hybrid of ice designs less finicky about seating depth, which is that they have a wide amount of tolerance.
Like all bullets, they will have a few 'sweet spots', whereas recant or ice bullets only like one or two, close or far.

Cheers.
 

gator378

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Joined
Apr 23, 2005
Messages
279
started reloading about a year ago and have never really messed with the seating depth of bullets, i typically just left them 20 thou off the lands and if it I did not find a good load would assume did not like that bullet. Yesterday I was doing the same for my 6.5 sherman short and for fun decided to try bergers suggestion on seating depth with the 140 vld bullet. glad i did. this particular barrel like the .150 off the lands. No telling how much time I have wasted as I would have never pushed the bullet in that far in the past.



View attachment 153565 View attachment 153566




My questions would be are most bullets this sensative to seating or are the vld's that much more extreme?
I think you found the magic load. correct amount of eye of newt from Shapeshere
 

DT400

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Jan 28, 2014
Messages
82
Location
Colorado SPrings, Co
Seating depth is an odd thing. I have one gun that shoots good groups every other .010. The smaller will be .3-.75 and the bigger 1.25-1.5. Over .070 of range. I tried these same seating depths three different times over two months and they held true to their grouping. Odd.
I had a, well, "discussion" with a supposed tech guy at Hornady who told me seating depth had "no affect on group size" I couldn't believe what I was hearing. After that I didn't believe a thing he said because he proved he had no idea what he was talking about.

Darrell
 

CA48

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Joined
Nov 18, 2009
Messages
994
Location
Texas
I ended up seating the 140 hvld’s about .015” off in my 6.5SS. And the 140elite hunters shot best at .125” off
Like can hunter said every bullet will benifit from seating depth testing. Most say the vld’s are more sensitive to seating depth and that they prefer to be seated near the lands or jammed.
 

Rick Richard

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Jan 7, 2014
Messages
3,457
Location
North Carolina
What kind of changes in depth should one take at a time? .010 or more? I will have to try seating changes in my 264 win. I started load @ .015 off getting MOA out to 400 yards. Maybe could be better?
Shooting 143 ELD-X's , if anyone wants to share experience.
I like the Berger document on tuning VLDs.
 

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