Seating depth. How far do you guys go?

[DShort]

Just curious how far in and out you guys play with your seating depth. I’m loading for a 22-250 with a pretty deep chamber. Right now my COL is 1.935 I can safely go to 2.050 and still have enough bullet in the case to be safe and still not touch the lands. that’s a difference of .115” I was just wondering at what point do you stop Extending the bullet towards the lands and with that much ground to cover should I go in .010” or .020” thank you

 

[243winxb]

Not a 22-250. My minimum for contact. If little bullet shank is in contact with the case neck, powder (ball) may not burn correctly.
Many rifles will shoot just fine with jump.

 

[Papa Charlie]

It varies from rifle to rifle and from bullet to bullet. I am shooting a 0.010" off the lands. When I do development I start at 0.005" and work my way back until the rifle and bullet tell me where it wants to be.
How far back you end up can vary widely between different rifles and bullets.

 

[Terry]

Just curious how far in and out you guys play with your seating depth. I’m loading for a 22-250 with a pretty deep chamber. Right now my COL is 1.935 I can safely go to 2.050 and still have enough bullet in the case to be safe and still not touch the lands. that’s a difference of .115” I was just wondering at what point do you stop Extending the bullet towards the lands and with that much ground to cover should I go in .010” or .020” thank you

Test it. Try .050 off to .020 in.

 

[dstoenner]

I try to keep at least 1 caliber (in this case .224) of bearing surface in the neck. Then they just keep jumping further. If they stop grouping I go to another type of bullet

David

 

[jepp2]

I was just wondering at what point do you stop Extending the bullet towards the lands and with that much ground to cover should I go in .010” or .020” thank you

What caused you to set your initial COL at 1.935"?

I normally start my development 0.020" off touch. That is provided I have enough seating depth (1/2 bullet diameter is my minimum). And my changes are 0.003" from my initial.

 

[DShort]

What caused you to set your initial COL at 1.935"?

I normally start my development 0.020" off touch. That is provided I have enough seating depth (1/2 bullet diameter is my minimum). And my changes are 0.003" from my initial.

Book col was 2.350” the bullet was to far in the case at that col so I pushed it out slightly( I had a post about it last week it’s a Nosler varmageddon bullet). So I started there. It’s just slightly longer than book col.

yes my rifle likes a little bit of jump with mine I will never be able to get anywhere close to the lands. So my question was should I try all seatings up to 2.050” that’s 11 different seating depths at .010” each.

 

[DShort]

I should have clarified that with my chamber I will never be able to touch the lands. Or even go .020” off. .020” off the lands only leaves like .100” worth of bullet in the case

 

[dcali]

Go out as far as you are comfortable. I’m perfectly content with 1/3 of a caliber of bearing surface in the neck. I don’t know what happens if you push it too far, other than that you risk having a bullet fall out of the case at some point.

Pressure does go down a little as you move out, so figure out a ballpark of where you want to be before doing charge weight tests.

 

[gman47564]

Just a sugestion.. do with it what ya want . I would seat it where the bottom of the bearing surface was just above the neck and shoulder junction.. do your powder testing there.. if you have to change seating one way or other after getting the powder right it will be minimal..

 

[243winxb]

I would start with the full diameter of the bullet shank at the neck shoulder junction. The boatail can be below the neck/shoulder junction.

The little 223/69 gr (see photo) has a lot of bullet deep into the case and shoots ok in AR15s. . So not a problem with your 22-250.

Find a powder & powder charge that looks ok.

Then from that original setting, go to a shorter col by .010" & .020"

Then from the original start , go to a longer col by .010" & .020"

This gives 5 different col to test. The original plus 2 shorter and 2 longer.

Keeping in mind the col must work with a magazine, if used. Feed ok. Chamber freely.


The ogive should not be below the case mouth. (As said below) good point.

 

[garandman]

Shortest I'll go is to ogive.

Typically I run from 50 to 10 thou off the lands.

 

[Nightraider]

.075 off the lands

 

[243winxb]

loading for a 22-250

Is the OPs cartridge.

Seems i took the thread off topic. Sorry.

Here is a 22-250 @ 2.350" SAAMI maximum col. Nosler 55 gt BT, 68 gr Hornady match & Win 55 gr fmjbt.
All would work, but the Hornady 68 grs ogive is very close to going below the case mouth. In fact, it may be?



The OP must be measuring head to bullet orgive?

Right now my COL is 1.935 Ican safely go to 2.050