Does Berger Make Jump Irrelevant?

Hikinghunter · Oct 10, 2024

So, I've worked up loads for all of two rifles, meaning my data pool is pretty limited. I'm both cases, though, seating depth just doesn't seem to matter. I start at 20 thou and it's great once I find my barrel node. Then I back up in increments to 100 just because you're supposed to try stuff. It's pointless, though. There's no accuracy difference based on seating depth.

I'm shooting Bergers (classic and hybrid hunters). Perhaps their claim about not being jump sensitive is actually true, I just have a hard time getting my head around it being totally true.

What have other people experienced with Bergers? I'm starting to think I'll just load at whatever standard COAL is and leave seating depth out of my load development process.

lancetkenyon · Oct 10, 2024

Seating depth can make a difference, even with Hybrids and Classics. Definitely with the VLDs. But some rifles don't care. I think you got lucky. HOW good are your rifles shooting? Sometimes you gain .1MOA, sometimes you gain .5MOA or more.

I test seating depths on every load.

Phil Rizzo · Oct 10, 2024

With Elite Hunters and Hybrid Target bullets, I've definitely realized an improvement.
My increments are .003 and anybody with just one good eye can follow the trend starting at about .015 off.
Seems to be in the 30 off area or close

Beluebow · Oct 10, 2024

If you're struggling to find the accuracy you want with a hybrid style bullet then by all means try a seating depth test. Other than that I see very little change over a wide range.

FEENIX · Oct 10, 2024

lancetkenyon said:
Seating depth can make a difference, even with Hybrids and Classics. Definitely with the VLDs. But some rifles don't care. I think you got lucky. HOW good are your rifles shooting? Sometimes you gain .1MOA, sometimes you gain .5MOA or more.

I test seating depths on every load.

This!

Hikinghunter · Oct 10, 2024

lancetkenyon said:
Seating depth can make a difference, even with Hybrids and Classics. Definitely with the VLDs. But some rifles don't care. I think you got lucky. HOW good are your rifles shooting? Sometimes you gain .1MOA, sometimes you gain .5MOA or more.

I test seating depths on every load.

This makes sense. It's there, it's just not all that dramatic. I'm getting 1/2 MOA on one rifle and 3/4MOA on the other, generally shooting 300 yards. Im not measuring groups with a caliper. I was looking 3/4 MOA to go to 1/4, or go the other way and spread out all over the target.

Varmint Hunter · Oct 10, 2024

Hikinghunter said:
This makes sense. It's there, it's just not all that dramatic. I'm getting 1/2 MOA on one rifle and 3/4MOA on the other, generally shooting 300 yards. Im not measuring groups with a caliper. I was looking 3/4 MOA to go to 1/4, or go the other way and spread out all over the target.

IME it's pretty rare to see that much improvement with only changing the seating depth, but anything is possible. It would be EXTREMELY rare for any hunting rifle to shoot 1/4moa. A well built hunting rifle may shoot 1/2moa but it won't do it without a favorable load that is built consistently.

However - to the point, seating depth changes do matter, but how much depends on the reload, the rifle and the shooter.

Jester560 · Oct 10, 2024

With VLD Hunting bullets, in my hunting rifle, seating g depth mattered huge.

Jam= 1.75 moa
.01 off= 1.75 moa
.02 off =1.25 moa
.03 off = 1moa
.04 off = .5moa
.05 off = 1.25 moa

.043 off = .25moa rifle will shoot sub 1" 5 shot groups at 400 yards with my son shooting it. With me, 2 inches at 400.

Hikinghunter · Oct 10, 2024

You guys must be able to find your lands more accurately than I can with my hornady oal guage. I get 10-20 thou variance if I try it 10 times. Sometimes you feel it as soon as it touches, sometimes you're jammed deep in the lands by the time you feel it touch. I stay 30 thou away from my average reading just to be safe.

hemiford · Oct 10, 2024

How do you test seating depth on a Weatherby with 3/4 of an inch freebore ?

lancetkenyon · Oct 10, 2024

hemiford said:
How do you test seating depth on a Weatherby with 3/4 of an inch freebore ?

Start at max mag length and work back. You won't find the lands 99.9% of the time. Seating depth testing can still make a difference.

Beluebow · Oct 10, 2024

Jester560 said:
With VLD Hunting bullets, in my hunting rifle, seating g depth mattered huge.

Jam= 1.75 moa
.01 off= 1.75 moa
.02 off =1.25 moa
.03 off = 1moa
.04 off = .5moa
.05 off = 1.25 moa

.043 off = .25moa rifle will shoot sub 1" 5 shot groups at 400 yards with my son shooting it. With me, 2 inches at 400.

I would expect that with a VLD style bullet....hybrid not so much.

FEENIX · Oct 10, 2024

hemiford said:
How do you test seating depth on a Weatherby with 3/4 of an inch freebore ?

Depends on what bullet you use. For instance, on my .257 WBY, below are bullets I have. From L-R, 110 Sierra, 145 Black Hole, and 163 Chinchaga. With the 145 and 163, it has no problem touching the lands.

Mikecr · Oct 10, 2024

hemiford said:
How do you test seating depth on a Weatherby with 3/4 of an inch freebore ?

Same as any other.
Seating tests also do not have to be taken to lands. We don't even have to know where the lands are.

Does Berger Make Jump Irrelevant?

Hikinghunter

Well-Known Member

lancetkenyon

Well-Known Member

Phil Rizzo

Well-Known Member

Beluebow

Well-Known Member

FEENIX

Well-Known Member

Hikinghunter

Well-Known Member

Varmint Hunter

Well-Known Member

Jester560

Well-Known Member

Hikinghunter

Well-Known Member

hemiford

Well-Known Member

lancetkenyon

Well-Known Member

Beluebow

Well-Known Member

FEENIX

Well-Known Member

Mikecr

Well-Known Member

Similar threads

Recent Posts