Before we get into the details yes this will be harder on barrels like a 257 Weatherby or 26 Nosler 20-250 and so on.
But if you ever have a B&C whitetail or mule deer at disance in a sketchy wind or need to snapshoot a holdover quick barrel life will be the least of your concerns.
This was built for ballistics and mild recoil for hunting.
I took a 7 PRC necked it down to 6mm. I made a couple changes to the case on the print and I had a custom reamer made for it.
You can still use 7mm PRC dies and there is no fire forming. To make cases I have a redding 7mm PRC bushing die set. I start with a .288 bushing and size the case down. I then go to a .280 and finish with a .272.
After that I trim and Chamfer and now are ready to load. I am using ADG brass until I can get some Lapua.
6-284 on the left 6mm Baba Yaga on the right.
The rifle specs are a Sako TRG-S action with a Shilen Match Sporter #3 8 twist 26.5 inch barrel. The Rifle was built by me.
For a bullet I am using the 115 DTAC nose ring. I was surprised on how easy this case was to tune. It was not any harder than a 6-284. By the third group out of the rifle I could have stopped because that is the load I will be using.
Here is the load of 69.5gr of unicorn dust velocity. I say unicorn dust because the powder is readily available and I do not want another R-26 situation. If someone wants to build one I will give out all the details.
I did have them up to 3541fps but the load did not shoot as good. If a guy used R-26, R-33 or US 869 I think you would see 3600 fps. I did not hit any high pressure nodes when I was working up a load and still had room.
This load is very consistent even with 2 different lots of powders it shoots 1/2 MOA or a little under at 100 yards. So now it was time to test it at distance.
I shot this at 610 yards off a bipod with a rear bag. I had a 4-6 mph crosswind from 3 o'clock. I did not hold any for wind I wanted to see how it cut the wind.
7ish inches of drift at 610 yards. I have the rifle 2 inches high at 100 yards thats a 300 yard zero.
The impact you see on the plate is with 4.5 MOA of elevation on the scope. Where I am shooting is 865ft above sea level.
You read that right. 2 inches high at 100 yards only needed 4.5 MOA for 610 yards. If you start looking at time of flight on this it is pretty crazy.
Outside to Outside.
I am going to call that load good enough. The recoil on the rifle with a suppressor is about like a 6-284 without one. Not having the rifle surpressed it recoils like a 257 Weatherby.
All in all this thing really impressed me with how easy it was to load for and the ballistics are down right scary hence the name.
But if you ever have a B&C whitetail or mule deer at disance in a sketchy wind or need to snapshoot a holdover quick barrel life will be the least of your concerns.
This was built for ballistics and mild recoil for hunting.
I took a 7 PRC necked it down to 6mm. I made a couple changes to the case on the print and I had a custom reamer made for it.
You can still use 7mm PRC dies and there is no fire forming. To make cases I have a redding 7mm PRC bushing die set. I start with a .288 bushing and size the case down. I then go to a .280 and finish with a .272.
After that I trim and Chamfer and now are ready to load. I am using ADG brass until I can get some Lapua.
6-284 on the left 6mm Baba Yaga on the right.
The rifle specs are a Sako TRG-S action with a Shilen Match Sporter #3 8 twist 26.5 inch barrel. The Rifle was built by me.
For a bullet I am using the 115 DTAC nose ring. I was surprised on how easy this case was to tune. It was not any harder than a 6-284. By the third group out of the rifle I could have stopped because that is the load I will be using.
Here is the load of 69.5gr of unicorn dust velocity. I say unicorn dust because the powder is readily available and I do not want another R-26 situation. If someone wants to build one I will give out all the details.
I did have them up to 3541fps but the load did not shoot as good. If a guy used R-26, R-33 or US 869 I think you would see 3600 fps. I did not hit any high pressure nodes when I was working up a load and still had room.
This load is very consistent even with 2 different lots of powders it shoots 1/2 MOA or a little under at 100 yards. So now it was time to test it at distance.
I shot this at 610 yards off a bipod with a rear bag. I had a 4-6 mph crosswind from 3 o'clock. I did not hold any for wind I wanted to see how it cut the wind.
7ish inches of drift at 610 yards. I have the rifle 2 inches high at 100 yards thats a 300 yard zero.
The impact you see on the plate is with 4.5 MOA of elevation on the scope. Where I am shooting is 865ft above sea level.
You read that right. 2 inches high at 100 yards only needed 4.5 MOA for 610 yards. If you start looking at time of flight on this it is pretty crazy.
Outside to Outside.
I am going to call that load good enough. The recoil on the rifle with a suppressor is about like a 6-284 without one. Not having the rifle surpressed it recoils like a 257 Weatherby.
All in all this thing really impressed me with how easy it was to load for and the ballistics are down right scary hence the name.
