Does Berger Make Jump Irrelevant?

[hemiford]

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.

I may have been confused on this issue. I thought seating depth was only critical for peak pressures and accuracy
when nearing the lands. Evidently not so. Or, does it simply make less difference, but still SOME difference,
even when no where near the lands ?

 

[Phil Rizzo]

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.

I bet !

 

[HARPERC]

Once I've met my needs, seating depth means little to me. Chasing seating depths can be fun, but it depends on the goal(s) one has. If aggregate reflects your small results don't stress.

 

[fruitnut]

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.

Tell me if my math is wrong. A very mild cartridge eats lands at the rate of 0.003 per 100 rounds. A barrel burner eats that in 20 rounds. That's more than 0.01 in 100 rounds for a barrel burner like say 264 WM. I can't see how chasing 0.003 inch seating depth adjustments makes sense.

Please tell me where I'm wrong?

How Fast Does A Barrel Erode?

A match-grade barrel is a big investment for many shooters, so how much life you can expect from it...

precisionrifleblog.com

 

[Phil Rizzo]

I let the target tell me.
And it does just that. Like the above example I see widening and narrowing with each adjustment, and it very visibly forms a trend!
When I get excited is when 2 different depths show basically the same tight group size.
I jump somewhere in the middle and go a while.

I don't load hundreds of rounds at a time, though. Probably more like 30-40