Received my 6mmWO
- Thread starter mc223
- Start date
Awesome cartridge for accross the course.
My upper came with Pac-Nor 28" barrel,wanted it for 300M and 600yd prone shooting only), stoney point ready threaded brass case, FL sizing die and seater.
First time out to set zeros,irons) at 100yds shot 150/150-14X. WOW, I had a grin from ear to ear. The 14-Xs were inside the X-ring of the MR-31C rarget, effortlessly.
First and only time at 600yds,sling/irons) shot a 594/600-30X. Haven't had time to continue playing with it, unfortunately.
Loves Varget,27.2 grns), RL-15 and others. Haven't chronoed yet.
Brass used is standard Remington 6.8, large primer, reduced to 6mm. Sweet and easy to form by running into die provided by Holliger. Brass is cut, chamfered, etc. after fireforming.
Just received new small primer brass from Hornady, can't wait to try it, but have received information Dennis Rugg that I would be swept away when comparing results over Remington brass. WOW, looking forward to this.
Primer used so far has been Russian LR. Why Russian ?,'cause I had 20,000 of them. They performed flawlessly, with no pressure signs.
Projectile tested so far has been Sierra 107 moly. No complaints here. Want to test Bergers: 88 FB, 105 LTB, and 105 VLD. Same for Hornady A-Max, Lapuas, and even the new BIB 105 FB.
I have almost finished a complete editorial covering Holliger's new caliber and space gun rifle as well, hoping, to present under "Rifle of the week". God permitting, I'll find the time to take pictures and obtain additional data soon.
Andy
My upper came with Pac-Nor 28" barrel,wanted it for 300M and 600yd prone shooting only), stoney point ready threaded brass case, FL sizing die and seater.
First time out to set zeros,irons) at 100yds shot 150/150-14X. WOW, I had a grin from ear to ear. The 14-Xs were inside the X-ring of the MR-31C rarget, effortlessly.
First and only time at 600yds,sling/irons) shot a 594/600-30X. Haven't had time to continue playing with it, unfortunately.
Loves Varget,27.2 grns), RL-15 and others. Haven't chronoed yet.
Brass used is standard Remington 6.8, large primer, reduced to 6mm. Sweet and easy to form by running into die provided by Holliger. Brass is cut, chamfered, etc. after fireforming.
Just received new small primer brass from Hornady, can't wait to try it, but have received information Dennis Rugg that I would be swept away when comparing results over Remington brass. WOW, looking forward to this.
Primer used so far has been Russian LR. Why Russian ?,'cause I had 20,000 of them. They performed flawlessly, with no pressure signs.
Projectile tested so far has been Sierra 107 moly. No complaints here. Want to test Bergers: 88 FB, 105 LTB, and 105 VLD. Same for Hornady A-Max, Lapuas, and even the new BIB 105 FB.
I have almost finished a complete editorial covering Holliger's new caliber and space gun rifle as well, hoping, to present under "Rifle of the week". God permitting, I'll find the time to take pictures and obtain additional data soon.
Andy
rcw3
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Picture of cartridges has 6mmAR on left and 6mm/6.8 SPC on right. Case capacity of 6mmAR = 36 gr water weight. Case capacity of 6mm/6.8 SPC = 33.2 gr water weight. The two cases are reasonably close in capacity. I assume a 6mmWOA is similar to a 6mm/6.8SPC, but I could be wrong. All of them are viable for across the course competition and shooting.
Picture of chrono tape = 6mmAR using 29 gr of Reloader 15 behind a Berger 105 VLD,2766 fps). I don't know what kind of velocity you would get with 27.2 gr of Varget out of a 6mm/6.8 SPC but it would seem based upon my chrono testing with the 6mmAR you might be running maybe 2600 - 2650 fps with 27.2 gr of Varget in the 6mm/6.8 SPC. With 29 gr of Varget in the 6mmAR pushing a Berger 105 VLD, the mean velocity was 2717 fps with an ES of 19 and an SD of 7. The post Andy just made indicates that his accuracy is there at 27.2 gr of Varget. The velocities and loads I have listed were with bare,non-moly) bullets.
Robert Whitley
www.6mmAR.com
Picture of chrono tape = 6mmAR using 29 gr of Reloader 15 behind a Berger 105 VLD,2766 fps). I don't know what kind of velocity you would get with 27.2 gr of Varget out of a 6mm/6.8 SPC but it would seem based upon my chrono testing with the 6mmAR you might be running maybe 2600 - 2650 fps with 27.2 gr of Varget in the 6mm/6.8 SPC. With 29 gr of Varget in the 6mmAR pushing a Berger 105 VLD, the mean velocity was 2717 fps with an ES of 19 and an SD of 7. The post Andy just made indicates that his accuracy is there at 27.2 gr of Varget. The velocities and loads I have listed were with bare,non-moly) bullets.
Robert Whitley
www.6mmAR.com
I started looking at both cartridges a while back and from what I have read, I think the 6 -6.8 or 6mmWOA will serve me well.
Mine is currently on order.
Mr. Whitly, in all fairness to the 6mmAR, looks like a hoot. But in my neck of nowhere I am driven by availability of powders and other components to suppport my recreation. 100 mile drives for components are not that much fun anymore. and to order powders and primers from the mail order places, well on a budget and can not order a ton at a time to help offset shipping and hazmat. I can get powder and primers locally if driving 25 miles and paying $23.49 per pound for Varget fits the budget.
Thanks for the replies so far.
Keep it going.
Mine is currently on order.
Mr. Whitly, in all fairness to the 6mmAR, looks like a hoot. But in my neck of nowhere I am driven by availability of powders and other components to suppport my recreation. 100 mile drives for components are not that much fun anymore. and to order powders and primers from the mail order places, well on a budget and can not order a ton at a time to help offset shipping and hazmat. I can get powder and primers locally if driving 25 miles and paying $23.49 per pound for Varget fits the budget.
Thanks for the replies so far.
Keep it going.
rcw3
Site $$ Sponsor
Robert
There are so many new cartridges around that I have a hard time keeping track.
What is the 6mmAR and 6mm WOA ? I assume the 6mmSPC is the 6.8 necked down with no other changes?
I have a couple of the 6.8 SPC cartridges but have never taken a good look at the brass. Is it high quality?
Ray
There are so many new cartridges around that I have a hard time keeping track.
What is the 6mmAR and 6mm WOA ? I assume the 6mmSPC is the 6.8 necked down with no other changes?
I have a couple of the 6.8 SPC cartridges but have never taken a good look at the brass. Is it high quality?
Ray
Hi Ray,
That is correct, the current 6.8 SPC is passed through the die once to close the neck into a 6mm diameter and ready to go, with no other changes. No neck turning required, great.
So far, I have only tested the Remington 6.8 SPC brass, into the 3rd reloading. Pockets remain tight. Initial accuracy quality has been there and remained there from the beginning.
As soon as I get pictures, I'll share with all.
Andy
That is correct, the current 6.8 SPC is passed through the die once to close the neck into a 6mm diameter and ready to go, with no other changes. No neck turning required, great.
So far, I have only tested the Remington 6.8 SPC brass, into the 3rd reloading. Pockets remain tight. Initial accuracy quality has been there and remained there from the beginning.
As soon as I get pictures, I'll share with all.
Andy
Hi Robert,
I share your thoughts regarding your presumed speed on the 6mm WOA cartridge. My numbers with 27.2 Varget also places it at 2,650-2,675 fps approx. This was my starting load to experiment with but was taken so much by its initial accuracy that I decided leaving it where it was. Time has also been an issue for me.
Now, I do have some shared information and a battery of material to play with. New brass, bullets, powder, primers, and a chrono.
As to moly, all I can say is that moly "has been very, very good to me",SNL-line). I always get a bit more speed with it and reduced pressures to boot. It has also guaranteed me same accuracy potential from the first round until the last one, it's all in the X-count, I guess.
The present goal is finding an accurate load within the 2,750-2,800 fps envelope, which surely with the new brass, and powder/bullet combination I am working with will have me there soon.
Thus far, 100, 300, and 600 yard accuracy has been very good to say the least.
Andy
I share your thoughts regarding your presumed speed on the 6mm WOA cartridge. My numbers with 27.2 Varget also places it at 2,650-2,675 fps approx. This was my starting load to experiment with but was taken so much by its initial accuracy that I decided leaving it where it was. Time has also been an issue for me.
Now, I do have some shared information and a battery of material to play with. New brass, bullets, powder, primers, and a chrono.
As to moly, all I can say is that moly "has been very, very good to me",SNL-line). I always get a bit more speed with it and reduced pressures to boot. It has also guaranteed me same accuracy potential from the first round until the last one, it's all in the X-count, I guess.
The present goal is finding an accurate load within the 2,750-2,800 fps envelope, which surely with the new brass, and powder/bullet combination I am working with will have me there soon.
Thus far, 100, 300, and 600 yard accuracy has been very good to say the least.
Andy
rcw3
Site $$ Sponsor
norpacmiami said:
Andy
I can't speak to the 6mm WOA, and whether it's the same as a 6mm/6.8 SPC because I have not seen the reamer drawing to know whether it's essentially the same as the 6mm/6.8 SPC that I made up. I believe it to be but I don't know for sure.
I went into the business of making and selling uppers in 6mmAR,a necked down 6.5 Grendel Lapua case) because there were certain aspects of it I preferred over a 6mm/6.8 SPC. I have a 6mm/6.8 SPC reamer, dies, brass, a barrel, bolt, etc., but I pulled the plug on the project for reasons I won't go into. I could just as easy make 6mm/6.8 SPC uppers as well.
Guys are buying 6mm versions of the 6.8 SPC case, shooting them and are very happy with them so that's good. Some people like Fords some like Chevys.
If I do anything with the 6.8 SPC cartridge in 6mm, I will probably make up one with a 30 degree shoulder angle, a bit longer body, and with less body taper to increase the case capacity and put some more "horsepower" behind it. This could be done so you could just run the 6.8 SPC cases through a sizing die to neck them down and set them up to shoot in the chamber, and you could use these pre-fire formed loads for practice, offhand, and sitting. This set up would also allow a guy to rechamber an existing 6mm/6.8 SPC to the "improved" version to get the extra "horsepower" and velocity.
Robert Whitley
www.6mmAR.com
If I do anything with the 6.8 SPC cartridge in 6mm, I will probably make up one with a 30 degree shoulder angle, a bit longer body, and with less body taper to increase the case capacity and put some more "horsepower" behind it. This could be done so you could just run the 6.8 SPC cases through a sizing die to neck them down and set them up to shoot in the chamber, and you could use these pre-fire formed loads for practice, offhand, and sitting. This set up would also allow a guy to rechamber an existing 6mm/6.8 SPC to the "improved" version to get the extra "horsepower" and velocity.
Robert Whitley
www.6mmAR.com[/QUOTE]
Robert,
I very much like your outlook on the "horsepower" side of the 6mm/6.8 SPC variant. I was looking for something similar 30-32 degree angle shoulders and lessening the body taper to obtain additional internal capacity. After all, my main intention was a space gun based mid range,300-600 yd)rifle exclusively.
But then, Holliger's iteration was the only available platform that fulfilled my criteria at the time,almost a year waiting). Without forgetting of course that he specifically intended this to be an across the course cartridge. That it has showed amazing performance at 600 yds is a big plus.
Also, John has volunteered that we could experiment with a more potent and dedicated mid range variant of the 6mm WOA.
Nonetheless, although the thought has stolen some night sleep away from me, reality occasionaly finds the better part of my brain and reminds me that if "horsepower" is what I want, maybe I should remain with the dedicated bolt action, faster caliber rifles standing in my safe. BTW, I bit the bullet and got hold of a Hendrick's 6CM last summer. Only had time to shoot it twice. It is scaringly fast and accurate. It will be my long-range rifle for many years to come, specially if the barrels last as long as he says.
Bottom line, I guess it's Chevy and Fords like you said.... lol
Andy
Robert Whitley
www.6mmAR.com[/QUOTE]
Robert,
I very much like your outlook on the "horsepower" side of the 6mm/6.8 SPC variant. I was looking for something similar 30-32 degree angle shoulders and lessening the body taper to obtain additional internal capacity. After all, my main intention was a space gun based mid range,300-600 yd)rifle exclusively.
But then, Holliger's iteration was the only available platform that fulfilled my criteria at the time,almost a year waiting). Without forgetting of course that he specifically intended this to be an across the course cartridge. That it has showed amazing performance at 600 yds is a big plus.
Also, John has volunteered that we could experiment with a more potent and dedicated mid range variant of the 6mm WOA.
Nonetheless, although the thought has stolen some night sleep away from me, reality occasionaly finds the better part of my brain and reminds me that if "horsepower" is what I want, maybe I should remain with the dedicated bolt action, faster caliber rifles standing in my safe. BTW, I bit the bullet and got hold of a Hendrick's 6CM last summer. Only had time to shoot it twice. It is scaringly fast and accurate. It will be my long-range rifle for many years to come, specially if the barrels last as long as he says.
Bottom line, I guess it's Chevy and Fords like you said.... lol
Andy
Which is the Ford? I like Cadilacs. Any way my thoughts were more like restrictor plate racing, Get all you can outa what ya got. I ordered the 6 WO mostly because the powder charges are only slightly greater than 223 and I like to be able to shoot a lot with out going on a hot dog and mac & cheese diet.
I am also new to this game of match shooting, and since I have used White Oak products before, I thought it was a reasonably safe place to start with an unknown.
Mr. Whitley, I have your site in my favorites. You never know how the twitchy wind of fate may blow. I try to put something new together twice a year, and 6mmAR is still on my list.
Thanks to all.
I am also new to this game of match shooting, and since I have used White Oak products before, I thought it was a reasonably safe place to start with an unknown.
Mr. Whitley, I have your site in my favorites. You never know how the twitchy wind of fate may blow. I try to put something new together twice a year, and 6mmAR is still on my list.
Thanks to all.
mc223 said:
Hi MC,
I finaly had time to test the new small primer brass last week and found it to be superb, accuracy wise. I remained with the original formula of 27.2 grns Varget, Russian primers, both same lot. Look at the attachment, 20 shots on the MR31-C at 100yds with irons/sling, WOW.
It was apparent that more capacity was available within this new brass design. I am looking forward to increase powder load and try it next at 300/600 yds.
The large primer already gave me 3 x 198s in a row with 30-Xs the first and only time out at 600, not bad.
Andy
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rcw3
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norpacmiami said:
Andy
I am curious what brand of small primer brass it is and where you purchased it?
I heard there was some small primer brass,made by one of the smaller companies) out there for sale, but I don't know much about it since I am not currently working with the cartridge.
Robert Whitley
Hornady has a small primer 6.8SPC case. Dunno if this was a stock item or a special run for Mr. Holliger. John had some a few weeks ago.
Steve
Steve
Well it came in today. My 6mm WOA upper. I got all my Hornady small primer brass prepped and sized. The whole process for 500 rounds took about 3 hours and went as smooth as if it had already been done. I'll get some loads ready to test later today and post a range report as soon as possible.
And as just another piece of info. the 6.8 SPC case will hold 31g of Varget after sizing. That is full to the case mouth rim. I think its gonna be a hoot to shoot. More later.
And as just another piece of info. the 6.8 SPC case will hold 31g of Varget after sizing. That is full to the case mouth rim. I think its gonna be a hoot to shoot. More later.
Hi i have tested a 20" Rem 700LTR in 6.8 i ended up shooting the 135gr Sierra MatchKings out off it at 2600fps and it shot very well back to 1000 yards. It actualy had an advantage over a 223 loaded with a 80go Sierra and a 308 loaded with a 155gr Sierra PAlma all shot through a 20" barrel for fairness. If it was shot in a 30" barrel like the match 223's and 308's it would be awsome for full bore here it would have awsome barrel life with a lot less recoil that a 308 and only slightly more than the 223. The powder that worked the best with the 135gr was Benchmark. I am looking at building a long barrel rifle in 6.8 26" long. I would love to try some with small primers i have contacted Remington and their answer was they had to keep the large primer to make the military specifications i cant see why if they had the Rem 7 1/2 primer they would perform better in my opinion. I was using CCI BR2 primers for all my testing. The 90gr Sierra's were traveling at just over 3000fps with H322 as the powder i think the straight 6.8 provides an awsome target calibre especialy if the barrels are short as the larger bore diameter realy allows faster powders to be used in full case loads and burns well in the shorter barrels.
Cheers Bill
Australia
Cheers Bill
Australia
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