Thanks for the work you put into this. Nice groups. I'm leaning toward CFE223 or LVR. It will be super to hear about your upcoming competition if you go with the 6mm ARC.
@@RobsReloading Honestly, it has been by reviewing shot data and recommendations from several reloading resources on line. Plus the convenience of ball vs stick in a small necked cartridge. I'm also more of a decent weather target shooter and hunter. That is, I'm not planning on being out for extended forays during inclement weather. I would have the factory ammo option if that was the situation and I had concerns.
Nice video, one thing to check in any reloading recipe is twist rate of the test barrel. Recently loaded up some Grendal, recipe was done with a barrel with 10:1 rotation, my barrel is 8:1 twist rate. Velocities were higher than expected and had pressure signs from the start. Velocities were more than 100 fps higher than expected. For my barrel I'm going to reduce charge by a full grain of powder per inch of twist change. That may be too much but better safe than sorry.
@@RobsReloading 1:8 is pretty standard for Grendal, my point was the recipe was for a 1:10 twist. The faster twist rate of my barrel, I believe, caused high pressures. YMMV.
Very nice, looking forward to the next test. If you care to tell about the upcoming match, what prep your are doing for it that would be interesting to many.
Interesting, how much case fill do those loads look like? Above 80% ? Are there any 6arc loads/powders that safely pressure at 100% fill or compressed?
I have more than a couple times on this channel. It's not my favorite method.. I don't think shooting one load at each charge gives enough information. You will see over the next few videos the methods I like to use to fine tune a load
Hornady does not include Varget in their bolt action load data for the 87gr Vmax. They list the max velocity with Leverevolution at 3050fps. They only list a load to 2750fps with Varget in the AR15 load dada.
Hornady doesn't list Bolt Gun data for Varget and the 87 grain Vmax. probably because Varget is too bulky. Even their Gas Gun maximum load is around 111% compressed. QuickLOAD says a max charge of Winchester 748 could get the 87 grain Vmax close to 3000 fps even out of an 18-inch barrel (bolt gun pressure).
I appreciate the videos especially for the 6arc. I am starting to come to the conclusion that 6arc in Ar15 platform is very limited. Meaning, if you want decent velocity, you are almost stuck with temp instable ball powders.
I don't have any experience with 6 arc in the AR, but think it would still be a great choice in an AR. Better velocity and ballistics than the 6.5 Grendel. I'm sure you can still get respectable velocities with longer barrel AR's. For myself I enjoy reloading for bolt guns more than the semi autos.
Other than velocity ARC outperforms 5.56 in every other performance category, But I still hear what your saying(grin), I think if one of the manufacturers came out with a factory load in the 85-95 grain range, all the need for speed anxiety would disapear for people, but the thing to remember in those lower weight bullets is they don't have the good BC numbers so you loose the 1000 yard supersonic capabilities with the ARC, I think it drops to 700 yards. I don't remember what forum I was on, but there was a guy sharing data, and he had 88-90 bullet(Berger?) and he was hitting 3500fps with great results, he dialed back the load to 3200-3300 just to improve barrel life, I should note that it was 24" bolt gun, but I would think a 18" AR would be right around 3000fps, which I think would be quite acceptable. then again I could be wrong based on the lower pressure limits for the AR.....So what the AR15 community needs is someone to take the new 6.8x51 bi-metal casing technology and apply it to the 6mm ARC, and then the pressure issue is resolved. 🤣
@@RobsReloading Yeah, I knew I had it in a PDF and that's why it was especially annoying! They shouldn't treat it as a separate caliber. They do the same for .223 Remington / .223 Service Rifle and .308 / .308 Service Rifle.
Can’t wait to see more !
27.5 looks really promising to me. Thank you. Stay safe and enjoy.
Thanks for the work you put into this. Nice groups. I'm leaning toward CFE223 or LVR. It will be super to hear about your upcoming competition if you go with the 6mm ARC.
What made you choose cfe and lvr vs some of the other more temp stable stick powders?
@@RobsReloading Honestly, it has been by reviewing shot data and recommendations from several reloading resources on line. Plus the convenience of ball vs stick in a small necked cartridge. I'm also more of a decent weather target shooter and hunter. That is, I'm not planning on being out for extended forays during inclement weather. I would have the factory ammo option if that was the situation and I had concerns.
Those middle loads definitely look very promising
Yes going to try and fine tune that next week!
Nice video, one thing to check in any reloading recipe is twist rate of the test barrel. Recently loaded up some Grendal, recipe was done with a barrel with 10:1 rotation, my barrel is 8:1 twist rate. Velocities were higher than expected and had pressure signs from the start. Velocities were more than 100 fps higher than expected. For my barrel I'm going to reduce charge by a full grain of powder per inch of twist change. That may be too much but better safe than sorry.
My rifle has a 1:7.5 twist. Pretty standard for the 6 arc.
@@RobsReloading 1:8 is pretty standard for Grendal, my point was the recipe was for a 1:10 twist. The faster twist rate of my barrel, I believe, caused high pressures. YMMV.
Very nice, looking forward to the next test. If you care to tell about the upcoming match, what prep your are doing for it that would be interesting to many.
Good video
Interesting, how much case fill do those loads look like? Above 80% ? Are there any 6arc loads/powders that safely pressure at 100% fill or compressed?
It would be a cool experiment if you could test the ELD-M vs cheaper BTHP match bullets in the future.
I've done some videos with the 105bthp from Hornady. I haven't tested any really cheap bulk 6mm bullets however.
I have some BR4’s. Will they work with the 6 GT as well? Not sure if the 6 GT requires a magnum like CCI 450’s. Thanks!
Not the cannon as advertised, is it❗️
Curious, why not run a satterlee ladder test for load development?
I have more than a couple times on this channel. It's not my favorite method.. I don't think shooting one load at each charge gives enough information. You will see over the next few videos the methods I like to use to fine tune a load
Hey Rob Great vid. I have a question about your stock. WILL my switchback drop right in to the MDT XRS CHASSIS ? If not what has to be done?
Yes
please do a video on 87gr vmax and varget an chase some speed and see where you end up
Hornady does not include Varget in their bolt action load data for the 87gr Vmax. They list the max velocity with Leverevolution at 3050fps. They only list a load to 2750fps with Varget in the AR15 load dada.
Hornady doesn't list Bolt Gun data for Varget and the 87 grain Vmax. probably because Varget is too bulky. Even their Gas Gun maximum load is around 111% compressed. QuickLOAD says a max charge of Winchester 748 could get the 87 grain Vmax close to 3000 fps even out of an 18-inch barrel (bolt gun pressure).
What stock, Bottom Metal, and mags are you running on that 110 Switchback? Tried looking through your channel to see if you did a conversion video.
Rifle is mounted in an mdt xrs chassis with a mdt 6arc metal mag.
I appreciate the videos especially for the 6arc. I am starting to come to the conclusion that 6arc in Ar15 platform is very limited. Meaning, if you want decent velocity, you are almost stuck with temp instable ball powders.
I don't have any experience with 6 arc in the AR, but think it would still be a great choice in an AR. Better velocity and ballistics than the 6.5 Grendel. I'm sure you can still get respectable velocities with longer barrel AR's. For myself I enjoy reloading for bolt guns more than the semi autos.
Other than velocity ARC outperforms 5.56 in every other performance category, But I still hear what your saying(grin), I think if one of the manufacturers came out with a factory load in the 85-95 grain range, all the need for speed anxiety would disapear for people, but the thing to remember in those lower weight bullets is they don't have the good BC numbers so you loose the 1000 yard supersonic capabilities with the ARC, I think it drops to 700 yards.
I don't remember what forum I was on, but there was a guy sharing data, and he had 88-90 bullet(Berger?) and he was hitting 3500fps with great results, he dialed back the load to 3200-3300 just to improve barrel life, I should note that it was 24" bolt gun, but I would think a 18" AR would be right around 3000fps, which I think would be quite acceptable. then again I could be wrong based on the lower pressure limits for the AR.....So what the AR15 community needs is someone to take the new 6.8x51 bi-metal casing technology and apply it to the 6mm ARC, and then the pressure issue is resolved. 🤣
What’s that program you use for velocity estimation?
Rob did you settle on Varget over N540
Yes ended up using 27.0 gr Varget. It was kind of a hot load and really should back it off a bit.
Just grabbed a brick of br-4’s today that I paid out the butt for and found some 75gr v-max bullets to try
F'ing Hornady app wants to charge me another dollar for 6ARC *gas gun* data, like it's another caliber. Highly annoyed!
Their 6 ARC data both gas gun and bolt is avail online for free to download.
@@RobsReloading Yeah, I knew I had it in a PDF and that's why it was especially annoying! They shouldn't treat it as a separate caliber. They do the same for .223 Remington / .223 Service Rifle and .308 / .308 Service Rifle.