. That was fun to read. Great question. Appreciate the content? That seems eerily uniform, but I guess it must just be the magic combination for those cartridges. Variable shoulder prefits have a smaller shank diameter than fixed shoulders on all action types since the nut creates a large torquing surface. Below are the weights for most contours finished to 26. I am honestly probably close to being clinically OCD, and he makes me look like a slob! Wow, that is hard for me to say! getting a vudoo apparition in xlr element. Heavy Varmint. That makes about 1/2 lb. Contour Dimensions: MTU: Shank Diameter (1.250") Shank Length (2.750") Muzzle Diameter (.930") Weight (7lbs) Length (29" Blank) . Yet Im sure it doesnt surprise anyone to see Bartlein is still on top. Just enter your email to receive notifications of new posts. Adding a little weight way out at the muzzle, can have a bigger impact than you might expect on how the rifle handles. Oops, spell check strikes again. Well said, Steve. Standard Target. Meant nitrided, melonite treatment of barrel. MTU. Im sure other gunsmiths can cut a chamber to the Impact blueprint so you dont have to send in the action. The Mil-C is also a very good choice, and is what I bought for a new rifle that will arrive any day now. Your series are absolutely priceless, keep up the amazing job!!! Lots of information. So Im glad to hear you noticed the improvement! What happens when you go to dial up over 100 MOA with this type of reticle. Order My Barrel. There is no mention of the 308 win cartridge used for the various barrels used Would be enlightening to know the kind of Barrels being used for the 308 win cartridge and in which contour/barrel length/manafacturer. Great question, Kurt. How often do pros clean their barrels? Or at least one more updated than 2015. In fact, Matthew Brousseau won the PRS for the second year in a row, and he was using a Krieger barrel. Our different sizes are .750 .810 .850 .900 which will satisfy most needs for any type of shooter. Palma Contours. Even if a company doesnt have a military contract, theyre probably hoping for one so they often focus on mils. I always look forward to your articles and objective data. Those are literally the next two articles Ill publish. The most common and widely supplied profile in both the U.S., Europe, and ROW is P/N AI-265XX. In fact, I noticed one of their rifles was represented among this group of top shooters, so obviously theyre extremely capable. . For me to agree with all of the parts and decisions on anything is a miracle! Ive found its hard to do side-by-side comparison of all these contours, so here is a table I made for quick reference. Once again, its why I really wish more studies were done in this area. So stay tuned for that. Ive seen his SDs below 2 fps before, and one time he texted me a photo of a LabRadar that recorded an SD that was in the 0s which is just crazy! Lengths shorter than 26 will have larger muzzle diameters. CONTOUR * MTU BARREL LENGTH * 29 INCH TWIST RATE * 1.10" Put me on the Waiting List. Out of Stock. Wow! The Mil-XT is a simpler version, but has all the features I need. Ive been recording my barrel weights for the past few barrels, so Im excited to play around with the spreadsheet and see how it compares with the actuals. One is coming up very soon. I appreciate the encouragement! I just mention those things as anecdotal support for your theory, and not just anecdotal support from some random guy from two of the smartest and most respected guys in the long range world. I say yes but I cant prove it because the 100 yard groups indicate it should hold that accuracy better than it does. Add To Cart. No idea. For more info, check out. Now at 1000 yards the groups are a little looser than my custom barrels. or slightly heavier than a Rem. match contour) was the most popular profile, followed by a Palma contour. Thread starter Dooby; Start date Nov 25, 2019; Forums. (Learn about the PRS & NRL.) Much will depend on the weight of the other components in your rig (scope, bipod, stock, action, etc.). Personally, I started MOA because I think it is more natural when you speak in yards and inches but after a few years I switched over to mils for a few reasons. I purchased a newish 22BR less than 20 rounds fired based solely on the fact that it was built by Shilen Rifles in the 90s and was in perfect condition. I dont ever use any of those things, so its just noise to me. AMU/MTU: 1.25 - 0.900 5 - 29 . Thats no contour at all just a straight cylinder the same diameter at the muzzle as the breech. Just curious as to why Hart barrels fell out of favor. This past year there were 3 shooters using a 6XC in the top 25 in the PRS, and 4 in the top 25 in the NRL. Not finding what you need? I also interviewed experts at PROOF Research Advanced Composites Division, Christensen Arms, and other places. Extraordinary accurate long range rifle. Cal Zant is the shooter/author behind PrecisionRifleBlog.com. Options include Light, Medium and Heavy Palma as well as custom Palma. Mission; Our Team; FAQs; Contact Us; More. Well, youre in luck! Great reading. Varmint/Sendero blank. There are some good ELR shooters using MOA scopes. (If someone has the muzzle diameter and weights for 26 barrels in all these, please share them in the comments.) You must log in or register to reply here. Paul Phillips on the Applied Ballistics team is one of them. I didnt ask that question, Mark. Im not familiar enough with the receiver of the Ruger Precision Rifle to know for sure. Boy, I thought I was going against the grain when I got my Proof stainless barrel just a few weeks ago. Hours are 9am to 5pm M - F, PST. The AI-1960 profile is very similar to the Medium Palma contour and has been the primary contour used by TEAM AI shooters. Thats why they have TV shows like Sheep Shape. My cousin bought the governors tag in Alaska for a dall sheep last year, and it almost killed him! While Im sure that plays into this, it may not be the only factor. In the US market in addition to the AI-265XX, AI has supplied the AI-1960 profile designed to weigh exactly 5 lbs finished @ 26 in .308 chambering. thanks. There is still so much to learn and objectively measure/compare when it comes to rifle barrels. One to two miles. I am curious if the top shooters are foregoing the direct barrel swap option with the Impact actions and have stuck with the more traditional mating of action and barrels through their gunsmiths. For comparison to the data in the above article, the weight of the blank would be just under 5 lbs. Of course correlation doesnt imply causation, meaning it might not be why they are using those barrels but simply a coincidence that the barrels they picked happened to primarily be cut-rifled barrels and it didnt play into their decision. Also, any harmonics or other similar effects that may be present are only amplified by the longer barrel. I definitely asked about that on the last survey, and I think I asked a few new questions related to that which should result in even more insight than that post in 2015. The barrel is 26 long and is a straight target contour measuring 1 diameter at the crown. When were doing load development, we often say were looking for accuracy nodes which many believe is related to the amount of time the bullet is in the barrel. to achieve the same launch conditions, from a shorter or longer barrel. Your posts always brighten up my my day. There was no mention of creating the rifling; button or hammer forging. Thanks again Russ. Straight Taper/Match Contours. Accuracy, however drives me. But, how much does that really matter? Bartlein explains, "Our rifling machines are so accurate, we can carry the twist rate to the 4th decimal point(example: 11.3642). Sporter Contours have a radius that starts 2.750 from the breach and creates a smooth transition to each taper diameter. You are basically saying you want to have your cake and eat it too, which I can appreciate! Scott Seigmund It's as simple as that. I usually go for 20-inch barrels on my bolt guns because of a test that we did on the .338 Lapua in which we tested barrels from 18 to 27 inches. Also if you start with a 30 barrel and cut off 2, its be very different than cutting off 2 off a 22 barrel. Im quite interested in entering production class, and Ive narrowed it down to the Badrock South Fork and the PVA John Hancock. There are a lot of different customizations you can make on a barrel that aren't available on the form, just since they . They dont specify any of that on their website. All Ive ever known is MOA, afraid to switch . Composed of a straight shank and two taper design. That might be the best source to get a bunch of them. MTU 6.43 Cal, your supposed to be an OCD engineer typewhat are you doing with a unicorn bilateral brain ? Thank yu. His conclusion was the carbon embedded in the brass made the friction on the bullet more consistent than a super-clean neck like on brand new brass or after itd be cleaned with an ultrasonic cleaner. He basically takes a really long barrel and cuts it off 1 at a time and records the muzzle velocities along the way, so you can estimate how much going from X inches to Y inches will impact your muzzle velocity. They responded by allowing us to develop the Competition contour. They can just cut the chamber according to the blueprint of the action, and know that my action matches the blueprint because they all do. These articles are like crack! MTU, M24 Straight Taper Barrel contour. when a guy is on vacation, they hire a new person, or want to cross-train), and that could affect the quality of the barrel you receive. They represented 50% of the top 10 shooters in the NRL, and 30% in the PRS. My plan is to have them both out before SHOT Show (starts Jan 22nd), and hopefully over the next 10-12 days. Its the definitive guide on this kind of stuff. The barrel is almost completely cooled down by the time I use it to run the next mock stage, because there is some time in transition (writing dope, loading mags, getting bags, etc.). im debating between 18" kukri (light varmint/medium palma ish), vs 22" kukri vs 20" MTU. Stuteville Precision is typically my gunsmith, but I usually buy the exact barrels I want to run and send those to him. Hes the absolute best reloader Ive ever met, and according to his data it does. Neither of those are available in MOA-based reticles. Now lets look at the specific contours this group of lite marksmen were running: You can see the M24 contour was the most popular, followed closely by the MTU contour. I thought that 21-22 barrel length would be about right but I quickly realized that according to the barrel timing graph the accuracy would fall off with a shorter barrel and this really got me to thinking. The MOAR reticle was the reticle in my first scope, which was the Nightforce NXS 5.5-22. Fixed Shoulder barrels offer our largest contour selection, from light to our heaviest contours such as MTU or M24 as well as Palmas, Varmints, Sporters, and our Taperless series. 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