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6CM Camp Perry Results

6CM Results at Camp Perry

My personal scores are not the focus of this post. The focus of this post is to add further evidence that the 6CM has extended barrel life. over other 6mm cartridges, with winning accuracy.

I started Perry with 2,525 rounds through my current barrel. This is beyond where most 6mm barrels have given up.

In the team match the rifle fired a 199-8X?,I’m not sure of the X count). However, the 1-point lost was at 4 o’clock and it was on call.

During the individual matches….

Day 1: 198-10X with 2 9’s. One was at 4 o’clock and one was at 7 o’clock and both were on call.

Day 2: 198-12X The first string was a 100-8X and this was with over 2700 rounds through the barrel. The X’s were good solid X’s.
The only shot outside of the 10 ring was an 8 at 3 o’clock. I did not call the shot there, but when I settled down on the gun the gun was high and left of the target. As I moved the sights towards the middle of the target I broke the shot as I was moving the gun and I must have been still moving the gun as the shot broke. This was an eye opener to me personally. I learned that I have to let the sights settle in the middle of the target before breaking the shot. If I don’t the shot will not be on call.

Day 3: I was about finished with the NRA Championship and I had yet to shoot a 200 on any yard line. I normally shoot some 200’s in rapid fire, but this year I did not have one. Going back to 600 I thought about this and I had a good mental attitude with the goal of shooting a 200 at 600.

I fired a 200-10X. The wind kept letting off, but the 6CM had the velocity to stay in the 10 ring, even if I missed the let off. The final 10 was on the line at 2:30 as the mirage went to a boil.

For the week I finished 7th overall at 600 yards with at total score of 596-32X.

The point of this post is not my success or lack of it, but that the 6CM with over 2800 rounds is capable of shooting these scores and better.

,I expect this barrel to be able to shoot winning scores up to 4000 rounds. Currently there has been no need to change seating depths and when I bore scope the barrel it looks good. The fire cracks are not extreme and the entry point a the throat is still sharp.)


I believe the 6CM and the 6XC to be equal in accuracy. The 6CM has a slight advantage due to the velocities obtained. We are shooting the 115 DTAC at 3100 fps or better with uncoated bullets.

However, the biggest benefit to the 6CM is the barrel life. The 6XC or other similarly sized cartridges,6mm-22-250) are not able to shoot the very slow burning powders necessary to obtain the extended barrel life and still give you velocities that are capable of winning in the wind. The smaller sized cartridges, it you shoot them so that you have the higher velocities, and the barrel lasts about 2000 rounds.

I have spent a lot of time in the development of this cartridge. I have talked to experts in all aspects of shooting and taken all of there advice to come up with the final product.

I believe this cartridge to be a great choice for any shooting discipline. You can shoot any 243 brass, including Lapua and Norma. You only need a sizing die as any 243 seating die works perfectly.

I am confident that anyone who chambers their rifle to 6CM will not look back at any other 6mm. It simply works and works well.


Joe Hendricks
6CM@comcast.net
 
Joe

Would you mind passing on the load you used for 600 yards at Perry. Brand of cases used and whether neck turned or unturned, powder and quantity, primer, bullet used & whether moly or not and whether loaded in or out of the lands and by how much, and what velocity this load would probably chrono at.

Robert Whitley
 
What is a 6CM anywho? I agree with the slower powders being easier on the throat.

I am considering a 6mm build sometime in the near future.

RHINOUT!
 
Rhino

Perhaps Joe should explain the 6CM, but it looks to me like a somewhat Ackleyized 243 Win, but it winds up with a 31 degree shoulder angle, a bigger capacity than a 243 Win, but with the steeper shoulder angle and presumably a little longer neck, it apprently is easier on the barrel,when using single base slow powders), requires less trimming, etc. More horsepower but better barrel life and apparently very good accuracy,although Jerry's results are not illustrating the accuracy so far).

Robert Whitley
 
Robet we missed ya at Bodines.

You missed a bitch of a wind switching day :)

My question is why are so many going to an around 30 degree shoulder? I see it on quite a few cartridages.

the new 6.5x47 lapua, 6 PPC, 308 Baer..etc.

I thought a closer to 40 degree shoulder was better for brass flow issues and barrel life.

RHINOUT!
 
Rhino,

40=degree shoulder is too hard for the brass makers to form. About 35 is the most they can do using regular production techniques. Yes a 40-deg offers,slightly) more stable brass and more case capacity. But I don't think there's any proof that a steeper shoulder has any accuracy advantage over a 30-degree. If it did, the PPC shooters would be runing 40-deg shoulders and they're not.
 
Robert,

The loading information is as follows:

Brand of Case: Lapua 243 Win

Neck Prep: Fire Form, Size neck to .273, inside neck ream to .243, Size neck to .271. This removes the donut.

Powder: 49.3 Gr of H1000

Primer: CCI BR2

Bullet: 115 DTAC, uncoated

Bullet Jump: .040"

Velocity: 3,050 fps

Joe Hendricks
 
Rhino,

Robert did a good job describing the 6CM.

It is based off the 243 Win case.

The formed case has a slightly longer body and slightly longer neck than the 243 Win. The shoulder angle is improved from 20 deg to 31 deg and the case is still tapered just like the parent 243 Win case.

Joe Hendricks
 
Joe

Thanks for the load info.

Did you also use that loading for the rapids and short lines? If not, what were you using there?

Robert Whitley
 
Robert,

I guess you want all of my secrets.

Short range I shot 107 Sierra's.

49.0 gr of H1000 with 215M primers.

Joe Hendricks
 
Joe,
I have found a problem with the barrel and edited my post, removed the five shot group sizes. The barrel MV's I think are OK, it just will not shoot anything. There is bad area about 2/3 the way down the barrel a rough section that gets copper fouled.
 
Jerry,

What now? I hope a new barrel that is either a Kreiger or similar.

Hopefully, soon, you can post data from a barrel that shoots.

Joe Hendricks
 
Joe

Thanks for the load info.

Just curious how you came to use 215M's for your short line loads with the 107's but BR-2's for the long line load. Did you mean 210M's or the magnum 215M primer? It just strikes me as odd to use the magnum primers,not that there is any particular reason not to).

Would I be correct to assume that with the 6CM, a "bread and butter" loading is around 48 - 49 gr of H1000 with either the Sierra 107 or the DTAC 115 and a fair amount of bullet jump?

Now Jerry was seeing pressure at 49 gr H1000, but a faster 1:7" twist barrel will run higher pressures with the same loading,at least the 1:7" twist barrels I have do just that, and that's one of the reasons I don't like them).

Robert Whitley
 
Joe, I'm curious as to what your barrel length is? In relation as to getting the 3050fps with. I've been kinda following the info. and talk on this cartridge here and there as I to shoot 6mm's with 107gr. bullets etc...for long range. Thanks, Frank @ Bartlein Barrels.
 
Robert,

As far as the primers go...I do shoot the 215M for short range.

The reason is that during my testing I found that Magnum primers gave better results through the chronograph. Not more velocity, but more consistent shot to shot. So I purchased 2000 215M's to shoot.

What I found is that at 600 yards the loads fired with CCI BR2's shot better scores. So that is why I went back to the CCI's for 600 yards.

Some things you can not explain.

Joe Hendricks
 
Frank,

I am shooting a 28" barrel in a heavy Pal ma contour.

I have heard great things about your barrels and I am anxiously awaiting my first two Bartlein barrels.

Joe Hendricks
 

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