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Suppressor on carbon barrel

helical weave combined with a long barrel will allow some droop on bolt barrels. shorter barrels should do better. i don't know how the 80/20 weave holds up to the can weight. on the helical weave there is a way to wrap it to eliminate that specific droop if you don't already have the barrel.
 
I have a friend running a 28" Proof barrel in .338 Edge. Shoots quite well. But, when he installs his 16 oz Titanium suppressor on, the point of impact drops 7" at 100 yards. Still shoots good, but quite surprising. I witnessed this in person and it was shocking to say the least. Just some food for thought.:D:oops:o_O

Paul

www.boltfluting.com
 
I have a friend running a 28" Proof barrel in .338 Edge. Shoots quite well. But, when he installs his 16 oz Titanium suppressor on, the point of impact drops 7" at 100 yards. Still shoots good, but quite surprising. I witnessed this in person and it was shocking to say the least. Just some food for thought.

there are specific wrap styles designed to hold the weight of a suppressor. carbon fiber is strong and stiff (vs. steel, per weight, not mass, and you're taking a lot of weight out) but if you want to hang a 16+ oz. can off a barrel that long it's going to need to have a different profile and wrap, which does exist. a 28" sendero with a .338" hole is a long tube for that much weight on the end. proof does make special wrapped bull profiles that were specifically designed to address this issue.
 
I shoot everything from 22-250 through 338 edge with a fluted rem varmint contour bartline between 26 & 30" with a can. Just curious about proof barrels for a little weight reduction on my 25-05 Ackley witch is my coyote go to.
 
I shoot everything from 22-250 through 338 edge with a fluted rem varmint contour bartline between 26 & 30" with a can. Just curious about proof barrels for a little weight reduction on my 25-05 Ackley witch is my coyote go to.
Your looking at about a 6 OZ savings over a fluted #5 contour by using a carbon barrel. Not much difference considering the $500 price difference between the two. Ive had 3 carbon barrels in my shop and they were the most crooked barrels I had seen. At that time I had probably looked through a 1000 or so barrels roughly. I threw them in my lathe to test for straightness. I put a deltronic pin at the muzzle and a rod at the throat. I tightened the spider chucks down finger tight so as not to bend the barrels and skew the results and indicated the pin and rod to under .0002. I then moved the rod back to the breech and discovered .008 runout. So in a distance of roughly 3" there was .008 worth of curvature in the bore. I turned the lathe on to 120 rpm and looked down the bore. Looked like a jump rope in their, lol. They got sent back to the manufacturer. If your looking for weight savings just get a fluted #5 contour. I do those in 90% of my builds for customers and every customer has sent me groups in the .2s or less moa wise.
 
Curved Barrels Matter!!! Stop the Hate.. LOL.

Index that curve at 12:00 and run it, is what I say, But I am a NO body and don't do work for others. Just ribbin ya a little Ryan, Hope you are well.

RussT
 
Current barrels are running very very straight as reported recently by a good friend of mine. They actually hired some Aero space Engineers to help them design tooling to create straight bore's. They also do everything in house now instead of getting blanks from other barrel manufactures.
Anyway I think things are looking up.

Russel
 
between 26 & 30" with a can. Just curious about proof barrels for a little weight reduction on my 25-05 Ackley

it's about 40% reduction vs the same steel profile. i'll acknowledge i have to compare a composite bull with the fluted steel varmint as it requires a stiffened bull to eliminate the droop. i don't know what they weigh in 25 cal, but i would be surprised if they weren't still noticeably lighter than the fluted varmint.


Your looking at about a 6 OZ savings over a fluted #5 contour by using a carbon barrel.

i am a bit skeptical of this but can't verify or deny it. i weighed two 20" ar barrels the other day, though, same profile and chamber/bore, and they weighed ~2lb and ~3lb. in this case it's a composite bull vs a fluted steel varmint. the fluted barrel might surprise me. is there a percentage weight savings you can generally count on by fluting? like 15-25% maybe? i know it depends on the flute dimensions...

So in a distance of roughly 3" there was .008 worth of curvature in the bore.

that's a scrap barrel now. i can't vouch for older processes. or other companies. you didn't say if it was a PR barrel and i guess it may not matter. i think ours scrap out from .005 over the whole length, .008 in 3" is definitely a big deal.

Current barrels are running very very straight as reported recently by a good friend of mine. They actually hired some Aero space Engineers to help them design tooling to create straight bore's. They also do everything in house now instead of getting blanks from other barrel manufactures.
Anyway I think things are looking up.

if you're referring to PR barrels specifically, they were always done in house. it's been suggested that we bought different blanks from a new supplier because a new batch or barrels shot so much better than early ones (i know one competitor wraps shilen blanks and seems to like them). the processes and equipment upgrade, they're not built the same way they were years ago and yes they are straighter now.

i will acknowledge there is more runout in the composite barrels than the steel barrels. some of the composite barrels stay straight, but despite stress relieving twice, some of the stress stays in some of the barrels. the steel seems to hold it all together and when you contour it down any remaining stress seems to present itself. the runout is definitely measured and limited. and some of them are still on par with the steel barrels in terms of straightness. the steel has some say in the process, too.
 
Im doing good Russ. Just been crazy busy building rifles. I sent the barrels back due to the fact that they were the most crooked barrels Id seen at that point. I would have had a little over $400 in labor on each barrel that I would have had to eat if they didn't shoot. Didn't want to take a chance on something that I knew wasn't right.

Jesse Geitzen: Yes it was a PR barrel however I chose to leave that out in the original post. All 3 barrels I had last year were that crooked. I took a fluted #5 contour 27" barrel in 7mm and put it on my digital postal scale. 4lbs 0 oz. you can subtract 2oz for the 1" you cut off the end. 3 lbs 14 oz. Proofs barrels weigh depending on their contours anywhere from 3 lbs 4 oz- 3 lbs 14 oz, as per your info on stockys stocks website for a 7mm. So its anywhere from nothing to 10 oz in weight savings for a barrel thats $900 vs a all steel barrel thats fluted for $410.

So when you say scrap out any over .005. Are you saying if I indicate your new barrels in so the breech and throat is running straight and clock the muzzle there will be .005 or less run out at the muzzle? If so thats simply phenomenal as there have only been a few barrels Ive seen that were that straight. I will find out in a couple months I guess as I have 2 customers sending me some barrels from you guys. I can let you know the results if you want. Not trying to come off as a jerk. Just stating what Ive seen in the 3 different barrels Ive seen from PR. 2 were 7mms and the other was a 6.5.
 
no, it's cool. i put hands on them every day and always learning. i would love to hear how the newer barrels you work on turned out, as well as when they were ordered. the composite has some good benefits but does present its own set of different obstacles to get around. it's a great option for some people and not a great option for others. it would be very unrealistic to think otherwise. i thought maybe my last post sounded abrasive while i was writing it, too. did not at all intend for it to read that way.

thank you for the heads up on the weight on the fluted 5 contour, i was curious. i did weigh a 24" bull today. it was not chambered and was rifled .264 and now i've completely forgotten what it weighed. it had a 5.5" tang, though so it wasn't exactly light. no fault of the composite, though, just a massive tang.

also sending a pm regarding dimensions.
 
I believe they got them from Dale Robinson who said he will have the shipment in a week or so. I just don't have time to work on them until after the first of the year.

Don't worry, your previous post didn't sound abrasive at all.
 
I recently had two 6mm Bartlein & one Krieger LV & HV barrels chambered by two different smiths both were quite bent, bent enough that the rod was tight so CF barrels don't have that by themselves...they all shoots so bent isn't an issue, heard of a fair few very bent button barrels lately to

I've had a few PR CF barrels happy with all of them so far here is one I put together & shot last weekend.





Not too shabby for a bolt gun let alone an AR :)



Oh & its suppressed
 
I use a SiCO omega on my christensen barreled 24"300WM. I get a minor 2" POI shift, but not the large drop some other users are getting. May be the shorter barrel, may be the lighter can, who knows.
 
I have a 24" Proof chambered in 6.5 Creed on a UltraLight action (not titanium maybe the next one) that I am very pleased with. If the runout is excessive, you sure wouldn't suspect it when you shoot it.

Would I buy another one? Perhaps - its one easy carrying rifle.
 
I use a SiCO omega on my christensen barreled 24"300WM. I get a minor 2" POI shift, but not the large drop some other users are getting. May be the shorter barrel, may be the lighter can, who knows.

might be the fabric weave, as well. as i understand it, their style of weave favors stiffness, and the helical weave favors heat dissipation. two styles with their own pros and cons.
 

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