Test Specifications/
Components
Firearm Used: Universal Receiver
Barrel Length: 24”
Twist: 1-8’’
Case: Hornady
Trim-to Length: 1.910’’
Primer: Winchester WLR
Remarks:
As with almost all cartridge case designs, there is bound to be at least a few aspiring off-spring. The 30 T/C case was no exception. The first notable development was the extremely popular 6.5 Creedmoor. As soon as the 6.5 Creedmoor was released in 2007, a 6mm version was being envisioned. After the 6mm Creedmoor demonstrated its worth at 1,000 yards it began to catch the attention of Precision Rifle Series (PRS) competitors.
The 6mm Creedmoor is a great fit for those looking for an AR platform friendly cartridge. It delivers velocities very similar to the .243 Win and yet fits the AR10 magazine length requirement, while allowing long range bullets to be seated for maximize case capacity. The 30 degree shoulder makes this a very efficient case and helps prolong case life as well.
The 6mm Creedmoor works well with powders such as H4350, RE-17, and Ramshot Hunter for heavier long-range bullet weights. Slightly faster powders such as RE-15, Win 760, and Vihtavuori N540 work well with lighter weight bullets.
Click here to download the 6mm Creedmoor load data for your 5th Edition Reloading Manual.
INDICATES MAXIMUM LOAD – USE CAUTION
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.
INDICATES MAXIMUM LOAD – USE CAUTION
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.
INDICATES MAXIMUM LOAD – USE CAUTION
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.
INDICATES MAXIMUM LOAD – USE CAUTION
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.
INDICATES MAXIMUM LOAD – USE CAUTION
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.
INDICATES MAXIMUM LOAD – USE CAUTION
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.
INDICATES MAXIMUM LOAD – USE CAUTION
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.
INDICATES MAXIMUM LOAD – USE CAUTION
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.
Sierra Bullets 
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Thanks. But the 100 gr. Bullet is showing .264 diameter not the .243 the other pages are showing.
Have a good day.
Duane
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Thanks Duane! This was a typo on our part. We have corrected that now. We need you on our proof-reading team! 🙂
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It shows .243″ on the PDF, but it still prints out at .264″
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Thanks!!!
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Nice – thanks! I’m on the fence between 6mm and 6.5mm, and this is another good reason to look at the 6mm.
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Great !! Finally a source I can trust. I have been shooting a 6xc for a few years and now I can try out the 6mm Creedmoor. Any hopes of providing 6xc data next? Lol
Thank You Sierra Bullets
Matt
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Finally. Great info. Now how about a new manual?
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We’re working on it Larry. It’s still going to be a while before we send anything to press, but we’re shooting data for a new one.
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Great – thanks! Now how about load data for the .25-45 Sharps? They load your 70 & 75gr bullets in their factory ammo…
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Hopefully time will allow us to do that cartridge also.
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Sharps load data is available from manufacturer. Limited. But there.
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Where is the load data for the 142 g smk?
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The 142 is a 6.5mm bullet. This load data is for the 6mm wildcat version of this cartridge. You are looking for the 6.5 Creedmoor data which can be found here: https://sierrabulletsblog.com/2017/01/09/sierra-bullets-6-5-creedmoor-load-data/
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Hey thanks. I found the info I was looking for.
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I am looking at the new .243″ 110gn bullet. I will be shooting it in a 6×284 with 1/7″ twist. I am looking at the load data presented here but see no indication as to what cartridge was used to develop this data. I have been shooting the 107gn bullet to just under 3300 fps so estimate possible 3200 fps attainable with the 110gn bullet. I am using the Sierra infinity ballistic program in my home pc but this program lacks data on this new 110gn bullet. I have no problem developing my own load data but need help in working up ballistic data. Could you please run a program for me with the 110gn bullet just using standard atmospheric conditions at 5800 ft elevation 40* F with a 300 yard zero , please ?
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Um, this data is for 6mm Creedmoor.
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What ?
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it says 6mm/65mm creedmoor. all i see is 6mm. what am i missing
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dont worry, i found it in a link.
shame that need all the powders on the list we can not use here in the UK as Europe are banning the powders.
vihtavuori and Swiss Reloader would be good.
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Why is this page labeled 6mm Creedmoor / 6.5 Creedmoor when they are two different calibers and bullet diameters, and you have a separate page labeled strictly 6.5 Creedmoor? Just trying to figure out why this page, showing .243 bullet load data, has a 6.5 Creedmoor label attached to it?
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Sorry for the confusion Scott. The official SAAMI drawing has not been released yet. There are firearms, ammo, dies, reamers, etc…., for the 6mm Creedmoor, but no official case drawing has been released. That being said, we had data ready to release. We chose to release it with a cartridge drawing based upon the actual reamer print. Seeing as how the drawing is not SAAMI approved yet, we chose to give it a temporary name as if it were a wildcat by calling it the “6mm/6.5mm Creedmoor”.
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Looking good! Pleased I chose the 6mm over the 6.5. H4350 paired with the 100gr. SBT should be good medicine for long range coyotes and perhaps whitetails. However, it’s doubtful I’ll give up my 7mm ’08 and 140gr. SBTs for the latter.
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Do you sell reloading book with 6.5 creedmoor in it
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No, the 6.5 Creedmoor data is available here though – https://sierrabulletsblog.com/2017/01/09/sierra-bullets-6-5-creedmoor-load-data/ and can be printed out and added our 5th Edition manual.
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will a 1×9 twist stabilize the 110 gr in the 6mm creedmoor ? thanks randy
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I’m gonna say no, Randy.
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I get weird groups with an 8 twist, no keyholes but weird.
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Depends on how fast you push it. Sierra states the 150gr SMK for the 6.5 Creedmoor won’t stabilize in an 8 twist, but it does when fired at 3000fps.
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Can I use this same information if I’m loading 243 Winchester? I can’t seem to find anything on the 110gr Matchking for 243. Thanks.
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Hi Vanessa,
That’s because a .243 won’t stabilize a 110 gr HPBT, unless it has a custom 1 in 7″ or so barrel.
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Are you going to be testing the 115 DTAC in this caliber? I was told that you make them for David Tubb. If you need some I will gladly mail you some.
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What load would recommend with Norma MRP Powder 70 gr Blitzking???
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Have you worked up a load with the SMK 107 with RL 26?
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what is the b.c.on the6mm 107 gr hpbt
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Sierra lists all their G1 BC data on their main website.
https://www.sierrabullets.com/product/6mm-243-caliber-107-gr-hpbt-matchking/
Data is in the middle of the page.
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Loading Sierra gameking 264 diameter 130 grain TGK is 130grain Sierra gameking TMK the same load data
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Why are your powder loads differing from that of Hodgdon and the Lyman reloading manual.
I’m in the UK using Sierra 60gn hp and Nosler 55 gn bt for varmint and fox shooting
Ie Hogdgon recommend a max load of H4895 @42 gn on 60gn hp
and max 44.5 on 55 gnbt
Very confusing
Thanks
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