- February 13, 2021
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The 6GT has much less case capacity than 6xc. Even so, the 6mm Creedmoor has received a lot of press because it’s undeniably well designed and offers definite advantages over similar cartridges. Thanks GAP. The 6mm Creedmoor was formed by simply necking-down Hornady's 6.5mm Creedmoor case (itself based on the Hornady designed .30 T/C) to accept 6mm (.243") bullets. Like the cases I formed from 6.5×47 Lapua brass, the Alpha 6GT brass will use a small rifle primer. Using this very hot charge, we were able to get 14 firings before the primer pocket failed. The knock on the Dasher is that 40 deg shoulder for feeding from other than a single-stack mag. Both the 6mm Creedmoor and 6.5 Creedmoor are light recoiling cartridge that are easy to shoot; especially for extended periods of time. The 6.5 Creedmoor commonly uses 120gr, 140gr, and 143gr bullets. It’s also offers match grade accuracy. What is the advantage, lower recoil? The 6mm CM is basically a necked down version of the 6.5 Creedmoor. However, the cartridge began turning heads in the hunting community. ga.src = ('https:' == document.location.protocol ? Or does it have the staying power necessary to compete with more established 6mm hunting cartridges like the .243 Winchester? The 6CM is sub MOA with point and shoot out to 300yds using the Hornady 103gr ELDs. The caliber must be easy-to-tune and predictable from barrel to barrel. The 6.5 Creedmoor has made quite a name for itself in long-range precision shooting, but the newer 6mm Creedmoor is giving it a real run for its money. Fortunately, there are also plenty of other good 6mm hunting bullets that will work very well in the 6mm Creedmoor. If that sounds like you, then strongly consider using this ammunition for deer, feral hog, and pronghorn hunting. Magazines: AICS and AW The 6mm bore diameter has long been relied upon for double duty, serving the deer hunter and varmint/predator hunter equally well. Using Varget powder, we pushed 115gr DTACs at 2950+ FPS on a pretty hot day. 6GT Stress Test — Don’t Try this at Home! In this article, Iâm going to discuss the pros and cons of the 6mm Creedmoor cartridge in detail. You can see the similarities and differences between the 6.5 Creedmoor and the .243 Winchester in the photo below. Hereâs how each cartridge compares directly to the others in general terms. Optic: Minox ZP5 5-25x56mm MR4 You've got tons of increments on 6BR to choose from. Dan has a lot more experience with wildcats and is the man when it comes to this type of data gathering. Its roots pre-date the 1950s, though 6mms had little support in the early years of bolt rifl… It can launch 103gr Vapor Trails at 3000+ FPS or lob heavy 115gr DTACs in the low-to-mid 2900s comfortably. Head to Head: 6 mm ARC vs. 6.5 Grendel. Barnes VOR TX ammo is also an ideal choice if you’re hunting in states like California that mandate lead free 6mm Creedmoor ammo for hunting. All aside, I thought this was a great article! We ran the charge weight up until the bolt was hard to lift. My question is about barrel twist. Stock: XLR Industries Envy Chassis The barrel needs to go 2200-2500 rounds with match-grade reliability and accuracy. These advantages can be accentuated if the shooter is using a lightweight rifle and/or shooting from unconventional firing positions.Returning to the topic of wind drift, … Loaded with a high BC 103 grain ELD-X bullet, 6mm Creedmoor Precision Hunter ammunition has a flatter trajectory and carries more energy down range than any other factory loads for 6mm Creedmoor hunting ammo currently available. Ballistics are very similar for the 6mm Creedmoor and .243 Winchester inside 500 yards, but the 6mm Creedmoor is much better suited for longer range shots since it can use those more aerodynamic bullets. The data used to compare the trajectory of the cartridges was obtained from Hornady (here, here, and here). Now let’s look at the primers used for the 6mm Creedmoor. After some research and talking to George, I ditched the 6mm Dasher build and had GA Precision build me a 6GT on a GAP Templar action I already had in the safe. Many of these are match bullets like the Hornady ELD Match, the Berger VLD, or other boat tail hollow point (BTHP) and open tip match (OTM) bullets that aren’t ideal for big game hunters. The 6GT is a bit bigger than a Dasher. The maximum loads for Hornady 95 SST and 100 grain InterLock bullets using four of the five most appropriate powders listed in the Hornady online data achieve a MV of 3150 fps, with the fifth powder (Superformance) achieving 3200 fps. The cartridge has a big advantage over the .243 Winchester in terms of wind resistance and is almost equal to the 6.5 Creedmoor in that regard. Thanks for your support. We discuss load data for the Berger 105, Sierra Match King 107 gr HPBT, 110 gr SMK HPBT, 115 gr DTAC for our Ruger Precision Rifle in 6mm Creedmoor. I’m onboard with Frank. While the cartridge design was optimized for Hodgdon Varget, the extra case capacity of the Alpha 6GT brass opens the door to Hodgdon H4350 (my favorite powder) and Alliant Reloder 16. All in all, this is outstanding 6mm Creedmoor ammo for hunting medium game like deer and pronghorn. This is trickier than most other cartridges, because you can buy brass for the 6 Creedmoor that has a small primer pocket or a large primer pocket. Basically, hunters can take any game with the 6mm Creedmoor that they could with the .243 Winchester like deer, pronghorn, and even elk in some cases. To further illustrate that same point, consider the supersonic ranges of the three cartridges. Refine by Caliber: 6mm XC 8mmx57 Mauser. That might be a bit much for a 26″ tube. The table below compares a 90gr Hornady ELD-X (.409 BC) load in .243 Winchester to a 103gr Hornady ELD-X (.512 BC) 6mm Creedmoor load and a 143gr Hornady ELD-X load (.625 BC) in 6.5 Creedmoor. These factors make the 6mm Creedmoor very forgiving of range and wind estimation errors while at the same time helping to maximize the shooting abilities of the hunter to the greatest possible extent. Refine by Caliber: 243 Win 25-06 Rem. The Big Game Hunting Blog is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com, Amazon.co.uk, Amazon.ca, Amazon.com.au, and other Amazon stores worldwide. Go all the way down to the 6mmBR, however, and you may not reach the accuracy node with desired bullets, and there can be feeding issues. Initial test results were as expected from a premium brass-maker. 6mm ARC is so new that as of the writing of this article, published load data did not exist! Alpha Munitions for the pre-production brass and answering tech questions I had on it. The 6GT is aiming for the “sweet spot” of bullet performance and mag-feeding reliability. The 6.5 Creedmoor was initially built for competition, but it also won the hearts of hunters. 6mm GT Reamer and Headspace Gauge The 6mm GT is a new cartridge design from George Gardner (owner, GA Precision) and Tom Jacobs (owner, Vapor Trail Valley Bullets) that optimizes cartridge dimensions for low SD's and extremely consistent performance both While it isn’t standardized by SAAMI as of this writing (January 2017), my understanding is it will be soon. So, if the Ballistic Tip ammo isn’t really your cup of tea and you prefer controlled expansion and high weight retention, then this ammo, which is loaded with their 90gr AccuBond bullet, is perfect for you. Since this article is focused on the performance of these cartridges for hunting, I didn’t include any ballistic data past 500 yards in the table above. That sharp shoulder IS great if you don’t like trimming cases. Alpha 6GT brass has 1.5 to 1.7 grains more case capacity. 6.5 Creedmoor vs 308 Winchester Debate Settled. The ability to make rapid follow up shots and quickly correct for misses is also extremely important. I think the down-range performance of the 6GT over a 6mmBR and the 6BR variants will be valuable on those days where shooting conditions are not as perfect. I don’t want to spend weeks developing a new load each time I spin on a fresh barrel. The 6mm ARC is basically the 6.5 Grendel necked down to hold a .243” bullet with the 30-degree shoulder pushed back a smidgen. This is reflected in the prices, availability, and variety of factory ammunition and hunting rifles currently in production for each cartridge. The major difference between 6.5×47 Lapua-formed brass and Alpha 6GT brass is the case capacity. For handloads, I’ve only used Starline 6mm Creedmoor brass, and here is where I landed! Looks like the 6 International by Mike Walker. On the Hornady website, the 108-grain 6mm Creedmoor is 250 fps faster than its 140-grain 6.5 Creedmoor load. Originally dubbed the 6mm HOLE (Hornady-Outdoor Life Express), Snow paired the new cartridge with a custom rifle built by George Gardner of GA Precision in 2009. Before we get started, I have an administrative note: Some of the links below are affiliate links. Is the 6GT cartridge accurate? If you don’t see something you like below, don’t fret too much. Have a competitive cartridge with the least possible recoil without sacrificing too much performance down range, compared to bigger options like the 6mm Creedmoor. In the absence of a muzzle brake, one advantage of the lower recoil is that for some it can be easier to spot trace and return to target quicker. how far were you shooting the 243? This cartridge is new to the shooting world, but it has been winning target competitions and bringing down animals at a high rate since its inception.The 6mm Creedmoor is nearly identical to the 6.5 CM which we have reviewed and compared to the .243 Win in a previous article. We determine the Load Data and COAL for our first loads for out initial reloading and how it was picked. Powders Discussed are Reloder 16, Hodgdon H4350, Hodgdon Superformance, and … The 6XC has a case that is larger than the 6-6.5×47 Lapua on right side of photo. The Hornady 10th Edition (p231-237 and p317-322) reloading manual was also used as a reference for the history of the cartridges and provided data to compare their size and recoil. When a piece of 6.5×47 Lapua brass is formed into a 6GT, the walls of the case now become the shoulder and part of the neck. The 6.5 Creedmoor has a similar advantage over the 6mm Creedmoor in kinetic energy. so what brand rifle are you shooting ? As you can see, the .243 Winchester and 6mm Creedmoor have almost an identical trajectory with just half an inch of difference in their point of impact at 500 yards. Even though it doesn’t match up well to the 6mm Creedmoor ballistically on paper, it’s still a great hunting round and it’s a whole lot easier to find .243 rifles and loaded ammunition. Due to the fact that it uses the 6.5 Creedmoor as a parent case and performs similarly to the .243 Winchester, the 6mm Creedmoor is most often compared to those two cartridges. Since the two cartridges are virtual ballistic twins, they’re both suitable for hunting the same sort of game under the same conditions. This data is for Hornady Precision Hunter factory ammo using a 200 yard zero and a 24″ barrel. Copyright © 2021 Big Game Hunting Adventures LLC | All Rights Reserved. The 6mm Creedmoor cases had an average water capacity of 49.2 grains, and the .243 Winchester cases held 49.6 grains, just about the same. On the other hand, the .243 Winchester has a longer case length, but a shorter overall length than the other two cartridges. H4350 burns slower and cleaner which should equate to better barrel life. Felt recoil will vary from shooter to shooter and rifle to rifle, but free recoil energy is still a useful way to compare cartridges. Combining an efficient case design with the wide range of excellent 6mm bullets, the 6 Creedmoor becomes an intriguing choice. Evolution From Paper Puncher to Hunter. The extra energy down range will make a spotter’s job a bit easier when targets extend beyond 800 yards. This means I will earn a small commission (at no extra cost to you) if you make a purchase. Unlike its bigger brother the 6.5 Creedmoor, there aren’t many options for factory 6mm Creedmoor hunting ammo right now. If you want factory ammo options, go with Creedmoor. Since then, demand for the new cartridge has continued to increase and Browning, Montana Rifle Company, Nosler, and Savage have joined Ruger in producing 6mm Creedmoor rifles. Leaving the debate out of the whole line up of 6mm cartridges but I’d like to Thank Vu and Accurate Shooter for a nice write up! So the 6GT has quite a bit less case capacity than a 6XC, but also less recoil. ... As a comparison, bullets with BCs in excess of 0.600 are common in cartridges like the 6.5 Creedmoor and PRC. Both loads recoil a whole lot less than a 143gr Hornady ELD-X from a 6.5 Creedmoor. There is a photo of a 4 shot 600 yard group which, while still a nice group, shows off center point impact on the paper which frequently is an indication of marginal bullet stability. Nosler also offers their Trophy Grade hunting ammo in 6mm Creedmoor. Action: Lone Peak Arms Fusion September 19, 2017 By Layne Simpson When Hornady introduced the 6.5 Creedmoor about 10 years ago, competitive shooters took note of the fact that it duplicated the velocity of the earlier 6.5x47 Lapua. This is especially true considering the lack of 6mm Creedmoor ammo and rifle choices at this point. Maybe a Gt improved will have 44 gr capacity… I love experimenting with new cartridges but this is getting absurd. It will also feed properly out of a standard AI magazine. Magazines: MDT With these results, I think a shooter pushing 110-115 grain class bullets in the low 2900s will get 16 to 20 firings from a piece of brass. Be able to run the same mag in all my guns without having to tweak or use mag kits. 6 Creedmoor barrel length and velocity. The bigger batch of production brass is due later this year. Action: Impact Precision 737 _gaq.push(['_trackPageview']); Dasher capacity = 41 gr, 6×47 Lapua capacity =45 grains… so the 6 GT is like 43 grains capacity? Editor: Look at the Top Photo. I forgot to ask for a comparison between the 6GT, 6 Dasher, 6 BRDX, 6mm Creedmoor in terms of velocity, accuracy, recoil, and barrel life… I had set myself on the 6mm Creedmoor path with a Proof Carbon fiber barrel mated to a tuned 700 , and I’m second guessing myself. The competition is timed, so first round hits are ideal, but there’s more to these competitions than small shot groups. In short, the 6mm Creedmoor has the advantages of the .243 Winchester (flat trajectory and low recoil) and combines them with the best features of the 6.5mm Creedmoor (wind resistance and the ability to use long, low drag, high BC bullets). So if you take that into consideration, I think the 6.5CM wins hands-down. My other favorite load is a Hornady 108gr ELDM at 2970 FPS. All signs are pointing to “Yes”. Sunday GunDay: Texas Precision — Mike’s 6mm GT Rifle, 6BRX: Long-Term Accuracy and Barrel Life Report, 6mm Dasher Basics — Bob Hoppe Talks about Loads, Comparative Burn-Rate Chart Lists 163 Powders, Beretta Acquires Legendary Holland & Holland Gunmaker, New Mexico Law Would Ban Under-12 Youth Firearms Training, Tactical Tech: New XTR Signature Rings from Burris, Sunday Gunday: How to Find Great Rifles at Live Gun Auctions, Brownells Super Barrel III — 14,000 Rounds of Ammo Contest. These high velocity, rapidly expanding bullets aren’t really suitable for big game hunting, but they’re absolutely devastating on varmints and predators. For this reason, the 6mm Creedmoor has less recoil and a generally flatter trajectory , but the heavier and larger diameter 6.5 Creedmoor bullets have more frontal surface area, more resistance to wind drift, and carry more … 6mm Creedmoor vs 6.5 Creedmoor Compared to the 6mm Creedmoor, t he 6.5 Creedmoor shoots heavier, larger diameter , and more aerodynamic bullets at a slower velocity. Would you recommend the 7 twist over a 7.5 or 7.7? Both use the same 6mm/.243â diameter bullets, but the 6mm Creedmoor was specifically designed to use longer, heavier, and more aerodynamic projectiles. possibly be a good Whitetail round with less recoil and better accuracy than a 243. l prefer single shot Hornady’s Precision Hunter line of ammunition is specifically designed for long range hunting. The 6mm Creedmoor was also intended for use from the start in semi-automatic rifles like the AR-10 as well as bolt action rifles. With a 110-grain ELD-X bullet, Hornady’s Precision Hunter .25-06 load makes 3,140 fps at the muzzle and generates 2,400 ft. …
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