I have been looking into this and the 6.5 creedmore. I have compiled some comments from the net into my documents. I'll dredge up some of the thoughts of others. Maybe it will get the conversation rolling along.
This was part of a discussion on 6.5 x 47 L VS the 6.5 Creedmore:
If you choose 6.5X47L with its small rifle primer, you'll almost certainly need the bolt face bushed to avoid serious primer cratering, even blanking before you get to maximum loads and full MVs. In my experience, this cartridge needs full-house loads to perform well, so this is a potentially serious disadvantage. You can of course have the work done, but should factor the cost in alongside that of rebarrelling.
The 6.5 Creedmoor holds approximately 5 grains more than the 6.5x47L. The Lapua uses small rifle primers, the Creedmoor uses large primers. The large primers will do better if you will be shooting in cold conditions. When David Tubb was developing the 6XC (about 2 grains more capacity than the 6.5x47L) he found the large primers to give more consistent ignition. The Creedmoor is .070" longer than the 6.5x47L. With both cartridges you are looking at one brass supplier for each.
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Everything below is the 6.5 x 47L:
berger 130 info found on net as part of a long article:
38 gr H4350, BR-4 Primer, Berger 130 VLD, .010" in lands (2.803" OAL), 2752 fps mean velocity, E 21, S 8
39 gr H4350, BR-4 Primer, Berger 130 VLD, .010" in lands (2.803" OAL), 2818 fps mean velocity, E 35, S 13 (one odd shot about 21 fps faster than next lower velocity and made E 35).
40 gr H4350, BR-4 Primer, Berger 130 VLD, .010" in lands (2.803" OAL), 2895 fps mean velocity, E 8, S 3 - No pressure signs, load probably has .5 gr. to 1.5 gr. more to go before pressure issues in the rifle.
General Comments on the 6.5 x 47 Lapua:
The cartridge seems to be extremely accurate for high power rifle shooting. After setting up the rifle and doing some quick chrono testing, this author shot the last 10 rounds prone at a 100 yard slow prone target, and came up with a 10x clean. The load was 37gr RL15, a BR-4 primer, with a Sierra 120 MatchKing and .015" jump (around 2.650" OAL). Trying out a 600 yard loading, another 10x clean was shot shooting the Lapua 123's at 2969 fps with 37.5 gr of RL15 with a CCI BR-4 primer and the Lapua 123 stuck in the lands .010" (around 2.753" OAL). The Lapua 123's shot also measure .2645" in diameter, and since they are a little "fat", they do run the pressures up over the 120 and 123 Sierras that run pretty true to .264" in diameter. For the short lines the 120 Sierras shoot with stellar accuracy whether you jump them or not, and they seem to shoot just as well if you shoot them at 2800 fps or up to 3000 fps. For 600 yards, the 123 Scenar offers a great B.C. (.547) with great accuracy and velocity as well. Definitely a cartridge worth looking into for across the course shooting as well as other types of shooting and competitions.
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A few rifles and their specs:
Broughton 26", SS, 5c, 1:8
140 Berger VLD, 42.1 gr Rel 17, Fed 205M
Runs 2960 fps
140 Part, 41.6 gr, Rel 17, Fed 205M
Runs 2869 fps
Both about .5 to .75 MOA groups out to 600 yds, the furthest I've shot it on paper
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Krieger, MTU, 26" SS, 1:8.5
AICS 1.5 stock
Shilen 2.5 lb trigger
TPS alum rings
NF 5.5-22x50 w/ NP-R1 reticle
130 Berger VLD, 40.8 H4350, CCI 450
Runs 2850 (now about 2820) and shoots mostly .5 MOA out to 1000 yds
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More comments:
The -47 case is an absolute joy to load. Other than initial trimming to even things up, I've yet to need to trim a case in 8+ loadings. I do anneal about every 4th shot. The Surgeon's throat has grown some .080" in wear with 1100 rounds and yet just hitting 2.8" OAL; still room to grow in the AICS mag. The 130's bearing surface/boattail junction is now 3/4 the way down the neck. Shot a 5", 1000 yd, 5-shot group earlier this month.
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6.5x47 Lapua....most accurate cartridge/rifle combo I've shot in over 60 years of shooting! Using Sierra 123 gr. HPBT and 38.5 grs. Varget I have fired several 5 shot groups from 1300 yds. that I could cover with a standard playing card! 1000 yds?? NO CONTEST!! This is a Jon Beanland build w/24" 1-8.5 Krieger tube.
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