Bullet seating and neck grip question

[DngBat7]

So I have a 6.5 creedmoor. The hornady eld match 140gr ammo I have used is 2.81 Oal. So I bought the hornady oal gauge with the 6.5cm cartridge. With the Berger 140 hybrid I measured 2.93/2.94. Does that sound normal? Seems like a massive jump. I am not “jamming” the lands but just letting it touch. Oddly with the hornady match factory ammo, with the bullets sitting that far back, are insanely accurate. It is a kreiger barrel, but still... would love some benchrest guys opinion on this as well

The other this is when I tried loading a Berger to that length, There is many 3/16 of the brass neck actually holding/grabbing the bullet. Is that enough? “Safe”?

Thanks

 

[watercam]

Hybrid and conventional tangent bullets (Sierra Matchkings for example) shoot very well jumped - a lot. I shoot mine off the lands by .040" for Palma. I know many who are out .070". VLDs may enjoy being closer to the lands. The whole point of the Hybrids was to allow flexible seating depth with a higher BC bullet.

 

[Milo 2.0]

So I have a 6.5 creedmoor. The hornady eld match 140gr ammo I have used is 2.81 Oal. So I bought the hornady oal gauge with the 6.5cm cartridge. With the Berger 140 hybrid I measured 2.93/2.94. Does that sound normal? Seems like a massive jump. I am not “jamming” the lands but just letting it touch. Oddly with the hornady match factory ammo, with the bullets sitting that far back, are insanely accurate. It is a kreiger barrel, but still... would love some benchrest guys opinion on this as well

The other this is when I tried loading a Berger to that length, There is many 3/16 of the brass neck actually holding/grabbing the bullet. Is that enough? “Safe”?

Thanks

1. Your chamber was probably reamed with a reamer designated Hornady match, the first ones were matched to the 140 amax, and the new eldm is close.
2. If you were to pull a bullet from your factory ammo and use your oal tool, you'll probably find that the jump is not that great.
3. Put the 2 bullets side by side and it will be visible as to why the hybrid needs to be seated out farther to contact your lands. The ogive shape of the 2 bullets are way different.
Hybrids can jump a fair distance and if you want to shoot them, play with the seat depth, you can jam them into the neck farther.

 

[DngBat7]

1. Your chamber was probably reamed with a reamer designated Hornady match, the first ones were matched to the 140 amax, and the new eldm is close.
2. If you were to pull a bullet from your factory ammo and use your oal tool, you'll probably find that the jump is not that great.
3. Put the 2 bullets side by side and it will be visible as to why the hybrid needs to be seated out farther to contact your lands. The ogive shape of the 2 bullets are way different.
Hybrids can jump a fair distance and if you want to shoot them, play with the seat depth, you can jam them into the neck farther.

When i had kreiger make the barrel, I did not name any specific bullet to them. I believe they used their standard reamer

 

[Milo 2.0]

When i had kreiger make the barrel, I did not name any specific bullet to them. I believe they used their standard reamer

Yes, I figured as much and you are going to work around that freebore for the life of the barrel.

 

[pirate ammo]

So I have a 6.5 creedmoor

so all the creedmoor people are having a show force lately,good for them,,

 

[DngBat7]

Yes, I figured as much and you are going to work around that freebore for the life of the barrel.

So what’s a safe amount no to go under as far as neck holding bullet?

 

[Milo 2.0]

So what’s a safe amount no to go under as far as neck holding bullet?

I'm going to say I'm not qualified to answer that. But in op, you said maybe 3/16", that is .190'', the length of your necks are close to .300", if you did in fact measure these numbers, you are fine.

 

[Dusty Stevens]

The bullets are not the same shape so comparing them accomplishes nothing. Every bullet, even different lots, need a new seating depth checked- unless youre setting the oal to mag feed then you dont even need the bullet comparator

 

[HTSmith]

So what’s a safe amount no to go under as far as neck holding bullet?

No magic number. Its a mechanical question. Will the cases hold the bullets firmly enough to stand up to handling and feeding?