6mm Creedmoor OAL Confusion

[sig2009]

Getting ready to take my 6mm Creedmoor barrel on it's madine shoot. I bought a few boxes of Hornady Black 105gn BTHP to break in. Out of curiosity I just took some measurements on he factory ammo from all the boxes. The OAL on the factory rounds is 2.695. Just looking at the Hornady manual for reloading the 6mm Creedmoor it states an OAL of 2.790. Curious why the OAL on the factory rounds is so short at 2.695 but the reloading manual has it at 2.790.

 

[spife7980]

So that they never have to answer the phone on why it doesn’t fit in someone’s chamber. Believe your chamber, not what the book says it should be.
And because oal is a basically useless metric other than for fitting in mags. The tip of the bullet shouldnt touch the barrel.

 

[Smokin7s]

Hornady black was also designed with gas guns in mind they shorten it up for that, I agree with the guy above ignore oal it matters not outside of making ammo short enough to go in a msg

 

[918v]

Getting ready to take my 6mm Creedmoor barrel on it's madine shoot. I bought a few boxes of Hornady Black 105gn BTHP to break in. Out of curiosity I just took some measurements on he factory ammo from all the boxes. The OAL on the factory rounds is 2.695. Just looking at the Hornady manual for reloading the 6mm Creedmoor it states an OAL of 2.790. Curious why the OAL on the factory rounds is so short at 2.695 but the reloading manual has it at 2.790.

Reloading manuals present data developed to a standard: SAAMI coal, pressure, etc. factory chambers are supposed to accept ammo made to SAAMI spec. As to why your factory ammo is short? Maybe because that’s where they got the reliability and accuracy at the targeted performance specs.

 

[sig2009]

Hornady black was also designed with gas guns in mind they shorten it up for that, I agree with the guy above ignore oal it matters not outside of making ammo short enough to go in a msg

Well that makes perfect
sense now. I didn't realixze that.

 

[sig2009]

Hornady black was also designed with gas guns in mind they shorten it up for that, I agree with the guy above ignore oal it matters not outside of making ammo short enough to go in a msg

Well I got my new PVA 6mm Creed barrel installed and the max oal I can get with the Hornady 105GN BTHP is 2,770 from checking the chamber with the gauge. So the factory Hornady Black loaded at 2.695 makes perfect sense. Funny though. The 105gn Barnes Match Burners have a max oal of 2.855 in my chamber. That's quite a difference in max oal's I can use with these two bullets.

 

[Smokin7s]

Well I got my new PVA 6mm Creed barrel installed and the max oal I can get with the Hornady 105GN BTHP is 2,770 from checking the chamber with the gauge. So the factory Hornady Black loaded at 2.695 makes perfect sense. Funny though. The 105gn Barnes Match Burners have a max oal of 2.855 in my chamber. That's quite a difference in max oal's I can use with these two bullets.

Because the ogive is in a different location on the bullet that’s why we don’t care about oal