6mm BR vs 6mm Creedmoor

[dgeesaman]

The first 5" of rifling past the throat were gone and it had fire-cracking for 2" past that.

That much freebore, should rename it 6 Dasher Weatherby

 

[shoot4fun]

That much freebore, should rename it 6 Dasher Weatherby

Had someone ask me how far I was in or off the lands with 105 Hybrids. I asked them how many thousandths in 5". LOL

 

[PilotPhill]

Thank you all for your advice! You have swayed me to the side of the 6mm br. I like the omg barrel life, precision, economical reloading, and it looks like there are good mags now available.

Any advise on an action? I was thinking of having Alamo Precision Rifles build the rifle for me. Trying to keep things close to 3k or less all up less the scope.

 

[shoot4fun]

Thank you all for your advice! You have swayed me to the side of the 6mm br. I like the omg barrel life, precision, economical reloading, and it looks like there are good mags now available.

Any advise on an action? I was thinking of having Alamo Precision Rifles build the rifle for me. Trying to keep things close to 3k or less all up less the scope.

For some reason Impact seems to be the hot one right now. Check out the action recommendations for the new MDT metal BR mags on the MDT website. Looks like they don't work well with any three-lug bolt.

 

[Dgd6mm]

I've got a 6br pre fit barrel coming. I'm thinking about putting it on a Bighorn Origin.

 

[Delfuego]

The Alamo action is a Stiller, I believe. For the same money, I like the Bighorn Origin. If you have extra cash laying around there are lots of good options. Just make sure they are familiar with 6BR repeaters.

 

[johara1]

My Dasher barrel that I shot the small group with at the 2016 IBS 1,000 yard nationals had under 1,500. When I got home after that match I cleaned and inspected with a bore scope. The first 5" of rifling past the throat were gone and it had fire-cracking for 2" past that. I have others that show moderate throat erosion and cracking after 400 rounds. My 6 Creedmoor barrel has well over 2,000 rounds of 3,100 FPS 105's and is in no worse shape that the 400 round Dasher barrels. I didn't make a SWAG when I said what I said. It was based on MY EXPERIENCE. But I am guessing you are the smartest poster on the internet?

I wouldn't say that but running them that hot does cook them but I also found that cleaning has a lot to do with it. For many years I cleaned with warthog 1134 and I could totally clean two guns in 15 min. and barrel life was good now it is gone and I had to go with over the counter cleaners. I can see life of the barrel shortened by wearing them out with a cleaning rod.. ..
It does seem strange that if both the same make of barrel going the same speed and the same bullet one would wear out faster that much faster...... jim

 

[shoot4fun]

I wouldn't say that but running them that hot does cook them but I also found that cleaning has a lot to do with it. For many years I cleaned with warthog 1134 and I could totally clean two guns in 15 min. and barrel life was good now it is gone and I had to go with over the counter cleaners. I can see life of the barrel shortened by wearing them out with a cleaning rod.. ..
It does seem strange that if both the same make of barrel going the same speed and the same bullet one would wear out faster that much faster...... jim

It has crossed my mind that it could have been a fluke barrel. They are both from the same manufacturer.
I clean regularly. each one has been cleaned after every 50 rounds or less. I have wondered also about powder choice for the 6 Creedmoor. RL16 lays down an extra thick sooty "coating" in the barrel. Maybe that helps with erosion?

 

[urbanrifleman]

I am doing a run of Alex Wheeler chamber 6bra Bartlein Remington prefits with Craddock Precision hopefully starting in a few weeks.

 

[czim]

I shoot mostly local 1-day PRS matches mixed in with one or two 2-day matches a year, so take my experience as such. A year ago I decided to have a custom built in 6br after running 6.5 Creedmoor for a couple of years. I went with a Impact Precision action and a Schneider 7 twist barrel built by C&H Precision Weapons. So far magpul mags have run very well even with +2 extensions. This combination has been very reliable and extremely accurate for me.

 

[Delfuego]

So far magpul mags have run very well even with +2 extensions.

Which +2 Extensions are you using?

 

[johara1]

It has crossed my mind that it could have been a fluke barrel. They are both from the same manufacturer.
I clean regularly. each one has been cleaned after every 50 rounds or less. I have wondered also about powder choice for the 6 Creedmoor. RL16 lays down an extra thick sooty "coating" in the barrel. Maybe that helps with erosion?

To be running a Dasher at 3100 it had to be Varget in it, only thing that lays down anything blacker is coal.... lol.... jim

 

[czim]

Which +2 Extensions are you using?

I am using the ones from C&H Precision Weapons.

 

[shoot4fun]

To be running a Dasher at 3100 it had to be Varget in it, only thing that lays down anything blacker is coal.... lol.... jim

When I got the Dasher to 3100 it was with Alliant 2000MR. If unfamiliar with it, the shape is more like ball instead of extuded and burn rate is approximately H4350.
RL16 is the powder I use in 6 Creedmoor. About like H4350 except it has the "copper preventer" technology. I think all that means is that the powder burns so dirty that no copper ever touches the barrel steel. LOL

 

[mysticplayer]

2nd year in PRS type games but many years in F class, and long range shooting. Consider the following:

High pressure and Hodgdon powders (any powder really) - kills throats in a big hurry. When your throat goes south, so does your accuracy.

Dropping 15 to 20% in peak pressure while burning 15% more powder to get the same velocity and bullet weight can lead to longer throat life.

Accuracy tuning is far less fussy when working at SAAMI pressures.

Function is every thing in this game. From what I see, function is the #1 source of grief in this game.

Creedmoor brass is surprisingly well made from a number of manfs and cheap like Rice. There is a good chance you will loose some brass at matches.

40 deg shoulders are not friendly to dirt or water.... shallower shoulder angle offer a bit more leeway to push crap out of the way.

FYI, I run Creedmoors... at reduced velocities.

Jerry

 

[lawrence97]

Thank you all for your advice! You have swayed me to the side of the 6mm br. I like the omg barrel life, precision, economical reloading, and it looks like there are good mags now available.

Any advise on an action? I was thinking of having Alamo Precision Rifles build the rifle for me. Trying to keep things close to 3k or less all up less the scope.

Like I mentioned earlier in my post, I have flawless feeding with magpul mags (cheap) in an MPA chassis with a bighorn tl3. My rifle is shooting under .25 moa at 100yds with a bipod and rear bag. With the tl3 I can use savage prefits or a conventional shouldered barrel. Depending on what stock, trigger, optic and a prefit or conventional barrel chambered by a gunsmith will determine your final price!

Don’t let anyone tell you using a savage barrel nut is less accurate either! Smooth feeding, fast bolt handling and getting a stable shooting position are more important things to worry about. I think 1/2moa to a max of 3/4 moa is sufficient because you will lose more points due to poor positioning and time constraints.

 

[johara1]

Like I mentioned earlier in my post, I have flawless feeding with magpul mags (cheap) in an MPA chassis with a bighorn tl3. My rifle is shooting under .25 moa at 100yds with a bipod and rear bag. With the tl3 I can use savage prefits or a conventional shouldered barrel. Depending on what stock, trigger, optic and a prefit or conventional barrel chambered by a gunsmith will determine your final price!

Don’t let anyone tell you using a savage barrel nut is less accurate either! Smooth feeding, fast bolt handling and getting a stable shooting position are more important things to worry about. I think 1/2moa to a max of 3/4 moa is sufficient because you will lose more points due to poor positioning and time constraints.

View attachment 1102422

I think you pretty much said what I was thinking on accuracy requirements for PRS, I look at from the 600 and 1000 yd. BR. side when.1 MOA. is required to be competitive and it needs to repeat.Barrel quality enters the picture, then your ability to read the conditions is a huge factor..... jim

 

[Nature Boy]

Right now I run my 27.5" 6BRA at 2910 fps with a 105 hybrid, 30.4 of H4895. Shoots in the 0.2's.

It’s interesting how often I see this load repeated. It’s where mine shoots the best too.

 

[moondog]

850 yards, 6BR Bighorn, pre-fit Chanlynn 8 twist, 105 hybrids @ 2885, shot today in 12mph wind., bipod and bag prone
30.2 Varget, 210m primer, es of 4.
Good enough for me

 

[Lefty Trigger]

I had everything bought and lined up to build a 6mm Creedmoor, including factory ammo, brass and dies all I needed was a barrel. I came across a deal on this site that had a slightly used 28" Criterion 6br barrel threaded with muzzle brake, dies, Lapua brass so I bought that for just a little more than the 6mm Creedmoor barrel. Since I got dies and brass I'm ready to go with the 6br caliber. Hope to have it up and shooting this week.