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Bench rest accuracy from a 6mm Creedmoor?

Lefty Trigger

Lefty Trigger

Well maybe not but I found a load that mine sure likes and shot this 3 shot group at 200 yds last night. Was able to repeat with really, really close results but not all 3 touching. Loading more to test for 300 yds on thursday night.
For comparison the other group (bottom pic) was shot on the same night with my 6.5x47 at 200 yds as well.

image.jpg
image (1).jpg
 
Those results are shooter and shooting platform.
Which was well done!

I don't buy into the "inherently accurate cartridge" theory.
 
I'd like to see more. Some 5 shot groups at 200 and 300 yards. I'm shooting 4 different 6mm cartridges right now. When the barrels are burned out on 2 of them I will be going to a different 6mm for a change. The 4 are 6mm Competition Match, .243, 6br, and I have a wildcat off the 6mm Competition Match which I call 6CMS. For people that don't know the 6mm Competition Match was called the 6CM way before the first reamer was ever ground for a 6 Creedmoor.
 
The 6mm Creedmoor is a close analog to the 6mm XC. Stand the two cartridges up alongside one another and its hard to tell them apart across the room. At least for my aging eyes. The 6mm Creedmoor Lee neck collet die works fine with the 6XC.

Hoot
 
I actually shot out a "affordable" (wont say cheap) 6mm BR barrel and debated for a week to buy a new BR barrel or go back to the 6mm Creedmoor. Well the Creedmoor won the coin flip, I have shot this barrel in the past but kinda gave up shooting it with just 94 rounds through it, removed it and shelfed it back. Kinda glad I put it back on. Spent the last 4 days working up loads and was really close and decided to back off from the lands a bunch more and go again and "BAM" it fell into place. Turns out the 107gr SMK's like to jump about .050...

Going to the 300 yard line tomorrow and have 10 rounds of that load and .1 on either side of it loaded up for testing. Hoping it holds up...
 
Good target. I have a 6BRX barrel with over 1700 rounds on it. Last weekend at a 20 shot 400 yd match it left me shaking my head. So I tried something I have never done before. I loaded up with and additional .003, .006, 009 lengthening of the round and shot them in comparison. I am currently shooting .017 in for the first 1700 plus rounds. And additional .0033 tightened the 100 yd group up a bit, over that they opened up a little. Went tonight to 200yd and with one bump right of the tuner shot a 4 shot group that measures .390 with no vertical. 3 literally in one hole than one cut into that at 4 o clock. Same bullet Lefty, 107 SMK. Shoot the exact same load in my other 6BRX but .003 less into the lands. Will find out how it repeats a a 500 yd match Sat. Hope yours and mine both repeat.
 
std7mag said:
I don't buy into the "inherently accurate cartridge" theory.
Click to expand...

I don't, either. If such a thing existed, we'd have figured out which elements of a cartridge make it "inherently accurate" with the thousands of wildcats that have been tried.

I think it's more the instance that some ratios of case design work better with certain powders as far as burn stability. With so many powders out there, I think it's almost a certainty that *some* powder will make a given cartridge pretty accurate if the rest of the rifle is up to snuff.

In other words, a 6PPC or a 222 Rem in a poorly machined rifle with a bad load is still going to shoot terribly. And a well-executed rifle in any cartridge can be made to shoot with some combination of components.

I think there are reasons to prefer particular case designs (brass flow, feed/extraction ease, primer pocket stability), but I believe none of them are dispositive with respect to accuracy.
 
I have a box of those 107 SMK that are next on my experimentation list. I would never have thought to use such a slow powder in either a 6 Creedmoor or 6XC. I have some H1000 for my 300WM. May give it a try. I do knw that the 110 SMK's that I'm currently playing with, are not working so well in my 26" 1:8 twist, seated kissing the lands over H4350. They're not going helter skelter. Just not very consistent groups. 108 ELD-M love that setup. I may try varying the jump on those 110's to see if it helps.

Good ideas here!

Hoot
 
I believe there absolutely are cartridges with advantages to achieve superior accuracy. Such as short fat powder columns as opposed to long narrow powder columns. That is not to say that with a well built rifle that has perhaps a better than average barrel can not be tuned to be very accurate and competitive. But if you build 100 6 pc's, vs, 100 .270 Winchesters which group as a whole will shoot tighter 100 or 200 or 300 yard aggs. I do not believe there is anything wrong with the 6.5 Creedmore. It's very close to the .260 and the 6.5 x 47. I am sure in the hands of the right shooter it can be just as effective and accurate as the other two. Has it become popular because it is better, or because it has had a huge marketing campaign behind it. To me it is valuable from the stand point it is a good cartridge with a catchy name that has energized a certian group of folks to embrace it and maybe get involed in some form of competition.The cream rises to the top and to ignore what is match in match out winning will not lead any one down a successful path. 6ppc vs 6br, both very good and depending on the type of match one will have an edge over the other. So you say, I will build a .243 with a bit more volume and perhaps a bit more velocity and clean both their clocks. Wrong, just does not work no matter what someone wants to belive.Nothing wrong with being a square peg in a round hole, it gives you a built in excuse, but be willing to accept not often being the winner. Just don't become a whiner because you ignored history.
 
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There is a Gun Smith that came up with .240NM ? when 6XC Brass and Reamers first came out .
I have had 6BR and now 6 Norma Dasher I am alway impressed with them .
We had a 600 X4 Match on Saterday F/Class Target 779-25X very windy and missed changes at 74 Not Bad ?
 
I cant remember right now but somebody actually list the H1000 powder as an accuracy powder for the 6mm Creedmoor. Seem like a bit slow unless your running a 30 inch barrel. For me Reloder 16 is the winner and I have tried Lapua 105's, Berger 108BT's and Sierra 107's and the Sierra's are doing the best at a .050 jump. Even the Sierra 123's in my 6.5x47L shoot best at a .076 jump,... not trying to figure out why but just running with it because it's working...
 
I shot my best 3 shot group ever with a 6 creed (in a tactical setup)
went thru 3 barrels. Great shooter. The 107's are one of the easiest bullets
to get to shoot good. The 110's are great if you can get them right.
Got tired of 400 supper accurate rounds and then spending to much time
chasing the lands after that. It's more of a barrel burner than I want now.
https://www.instagram.com/p/BX1Ia0jjJLv/
 
Jeffppc,

Nope, i don't buy it!
308 was listed as "inherently accurate" over 30-06 for years.
It is more "efficient" in powder used vs velocity. And the whole use of short action vs standard action.
Build an 80lb rail gun on both, and at distance i'd bet the 06' would shine above the 308.
270 Win is an unfair comparrison as bullet development for .277 is lagging in the match department. Same for .257.

284 Win vs 280 Rem may be a be a better comparrison.
 
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